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Artists Justin Roberts and Nathan Kennedy inside the sculpture Sacred Rhythm Mother

A new monumental sculpture rises from the Earth at Firefly Grove Park

September 2, 2026  |  Topics: featured artist, Places


By Eddee Daniel

Like the recently planted saplings surrounding her, she rises from the hillside, growing out of the Earth. She gestures out towards the park in front of her, long flowing hair wafting around her head as if caught in a momentary breeze. A bevy of stylized but recognizable animals, which she seems to have released, stands just beyond her outstretched hand. Her gaze takes in the entirety of her new home, Firefly Grove Park, with its carefully and creatively designed landscape, unconventional playground, and already famous previous inhabitant: Mama Rosa, the giant and mischievous troll.

Mama Rosa, the lamppost-sniffing troll, was installed a year ago in the new park by its creator, Thomas Dambo.
Mama Rosa, the lamppost-sniffing troll, was installed a year ago in the new park by its creator, Thomas Dambo.

She is called “Sacred Rhythm Mother” by her creators, Justin Roberts and Nathan Kennedy of the creative team Walk the Willow. They were commissioned to do the work by Discover Wauwatosa, the city’s official tourism organization, which was also instrumental in the development of the park.

Walk the Willow artists Justin Roberts, foreground, and Nathan Kennedy, working on the unfinished sculptures. Kennedy, background, is welding the steel structure that supports the bent willow "skin" of Sacred Rhythm Mother's head, while Roberts adds a willow branch to the arm.
Walk the Willow artists Justin Roberts, foreground, and Nathan Kennedy, working on the unfinished sculptures. Kennedy, background, is welding the steel structure that supports the bent willow “skin” of Sacred Rhythm Mother’s head, while Roberts adds a willow branch to the arm.

“We’re thrilled to create such a momentous piece like Sacred Rhythm Mother in one of the most whimsical and imaginative parks we’ve ever seen,” said Justin Roberts, Walk the Willow CEO and lead artist. “It’s clear to us that Wauwatosa shares a similar goal and passion as our team—creating conversations about restoring our natural world through awe-inspiring art.”

Assistants trim willow branches in preparation for placement on the sculptures.
Assistants trim willow branches in preparation for placement on the sculptures.
Roberts adds a willow branch to Sacred Rhythm Mother's forehead.
Roberts adds a willow branch to Sacred Rhythm Mother’s forehead.

It’s clear from the work that Roberts and Kennedy don’t just “walk the willow” but also “walk the talk” of restoring the natural world. The sculptures are made from recycled materials, along with willow, invasive buckthorn, driftwood, and other natural elements, some of which were harvested right in the park. All of which is especially fitting in Firefly Grove since the park itself was created out of a reclaimed landfill.

A youngster discovers the kid-size entrance underneath Sacred Rhythm Mother's flowing hair.
A youngster discovers the kid-size entrance underneath Sacred Rhythm Mother’s flowing hair.

The centerpiece of the sculptural ensemble, Sacred Rhythm Mother’s head, which is presented only partially emerged from the ground, stands eleven feet tall—large enough to hold her own in a neighborhood that includes a giant troll. She is more than awe-inspiring, however. She is also interactive and family-friendly. At the opening ceremony on Friday evening, her appeal was immediately apparent to children of all ages, as well as the merely young at heart. Kids quickly discovered the two child-sized entrances into the interior at the ears, underneath the flowing hair. An adult-scaled, ADA-compliant arched opening at the back of her head ensures that anyone can access the inside as well.

The Sacred Rhythm Mother ensemble.
The Sacred Rhythm Mother ensemble.
A grouping of animals "released" by the Sacred Rhythm Mother, including mink, mallard, kingfisher, turtles, and muskrat.
A grouping of animals “released” by the Sacred Rhythm Mother, including mink, mallard, kingfisher, turtles, and muskrat.
The seven-foot-tall great blue heron and its more diminutive companion, a little green heron.
The seven-foot-tall great blue heron and its more diminutive companion, a little green heron.
Detail of the belted kingfisher.
Detail of the belted kingfisher.

A large crowd attended the opening. After remarks by Justin Roberts and Beth Gleesing of Discover Wauwatosa, there were also readings by local children’s author Jessica Stremer and Wisconsin Poet Laureate Brenda Cárdenas. Taking a cue from Walk the Willow, Stremer read from her recent book, Wonderfully Wild, which features a willow tree. Cárdenas read an evocative poem about the new sculptures that she had written especially for the occasion. With her blessing, the poem is reprinted below.

A family poses for a photo op in front of Sacred Rhythm Mother's head. Mama Rosa now has competition as a backdrop for selfies and portraits!
A family poses for a photo op in front of Sacred Rhythm Mother’s head. Mama Rosa now has competition as a backdrop for selfies and portraits!
The interior of Sacred Rhythm Mother's head proves to be another appealing spot for photo ops.
The interior of Sacred Rhythm Mother’s head proves to be another appealing spot for photo ops.

“The new sculptures represent another truly unique attraction anyone can experience in Firefly Grove Park,” said Beth Gleesing. “The park is quickly becoming a microcosm for what we want locals and visitors to experience in Wauwatosa—a place where art, nature, fitness, and community intersect. And we’re happy that Mama Rosa will have a permanent friend.”

Live animals grace the Firefly Grove pond out in front of the new sculptures, including this gaggle of geese and...
Undeterred by the human activities all around them, live animals grace the Firefly Grove pond out in front of the new sculptures, including this gaggle of geese and…
... a painted turtle.
… a painted turtle.

The park itself is only a year old, but has already attracted regional attention. With the additional sculptures Wauwatosa seems to be positioning Firefly Grove Park as a destination for those interested in popular family-oriented and earth-centered public art works. Officials are also quick to point out that the placement of the new sculptures on the north-facing slope will not hinder its already popular use as a sledding hill.

A boy finds shelter within the palm of Sacred Rhythm Mother during the opening ceremony.
A boy finds shelter within the palm of Sacred Rhythm Mother during the opening ceremony.

Walk the Willow, located in Kentucky, has established a reputation for large-scale sculptural pieces made from willow, as well as functional furniture and basketry. Roberts and his work have been featured in Southern Living and regional PBS shows in the last decade. More information about Walk the Willow and previous works can be found on their website.

Justin Roberts adds a willow branch to the unfinished head, seen from the interior.
Justin Roberts adds a willow branch to the unfinished head, seen from the interior.

Sacred Rhythm Mother

(inspired by Justin Roberts’ sculpture of the same title and the Anishinaabe Flood Story as told to me by Keewaydinoquay)

~ Brenda Cárdenas

Spirit coils willow branches, twists

buckthorn, wraps and weaves them

around metal stems until an arm stretches

into an open hand and fingers unfurl,

releasing Mallard, mink, kingfisher

who waddle, skulk, skim to rivers, ponds,

lakes. Blue and green herons follow

Earth mother’s gaze, flapping fringed

wings to join jet streams while dust,

ash, steam and sand whirl in the wind,

all dancing to sacred rhythms—ocean

waves smacking the continental

shelf, each season beating its drum.

Here, muskrat and turtle reunite

reminding us that after the great flood

when pairs of birds, animals, insects

floated on a raft in endless water

unable to find land, muskrat swam

to the depths for a handful of dirt,

finally surfacing as he drew his last

breath. Grateful for this sacrifice,

turtle offered his back as ground

for a new world. And so the sacred

cycle continues to spin. And so

the sacred rhythm continues to pulse.

And so, our mother looks upon us,

extends her hands, invites us to join

her in an ecstatic dance of hope.

Learn more about Wisconsin’s poet laureate, Brenda Cárdenas, on her website.

                       

The Walk the Willow team of Justin Roberts and Nathan Kennedy posing inside Sacred Rhythm Mother's head.
The Walk the Willow team of Justin Roberts and Nathan Kennedy posing inside Sacred Rhythm Mother’s head. “Getting to play with sticks for a living and being in this beautiful community, what a magical experience this past month has been!”
~ Justin Roberts

Thanks go to Discover Wauwatosa for most of the factual information in this story.

Related stories

Firefly Grove:

Firefly Grove Park opens with a bang! And a troll.

Public Sculpture:

New public sculpture on Hank Aaron State Trail: An introduction

A Woodland Sculpture Garden and a Wilderness Walk

The Birds Are Here: Public Art Lands on Lakeshore State Park

West Bend Sculpture Walk 

Stevens Point Sculpture Park

Author Eddee Daniel poses with his grandchildren in front of Mama Rosa.
Author Eddee Daniel poses with his grandchildren in front of Mama Rosa.

Eddee Daniel, writer/photographer, is a board member of Preserve Our Parks, the Program Director of A Wealth of Nature, editor of The Natural Realm blog (and a former art educator and resident of Wauwatosa). Read more or subscribe at awealthofnature.org. Also available by arrangement for group presentations and guided tours.

The Natural Realm blog is part of A Wealth of Nature, which is a program of Preserve Our Parks.

About Preserve Our Parks

Preserve Our Parks, Inc. is an independent nonprofit organization dedicated to the preservation of parks and green spaces.  Our mission: To advocate for and promote Milwaukee area parks and open spaces and to strive to protect the tenets of Wisconsin’s Public Trust Doctrine. 

For more than 25 years, we have been a leader in advocating for the protection of Milwaukee County park lands, halting many proposals to develop, privatize, or sell local parkland and lakefront spaces.  More information about POP, including past accomplishments, is available at www.preserveourparks.org.


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