The Design Behind Its Lasting Appeal
With two round eyes and a curving grin, Bilibo looks like a character waiting for its story to begin. Designed by Swiss designer Alex Hochstrasser, the sculptural shell is an open-ended toy that can become anything from a seat or boat to a helmet or drum. Twenty-five years after its 2001 debut, the toy remains remarkably unchanged, a testament to the enduring appeal of a design that leaves almost everything to the imagination.
To mark the milestone, Moluk, the Zurich-based toy company Hochstrasser runs with his sister Doris, an architect, is introducing Bilibo Midi, a smaller shell for toddlers, and Bilibo Dots, a set of colorful counters that translate the original’s open-ended approach into a new form.
Photography courtesy of Moluk
Both additions build on the premise that has carried Bilibo into homes, classrooms, and museum collections around the world—and continues to anchor Moluk’s entire catalog: offer a pared-back object and leave the rest to the imagination.
The Toy That Lets Kids Make the Rules
Hochstrasser’s starting point for Bilibo was what he saw on store shelves at the turn of the millennium. “I was struck by how rigidly most mainstream toys were categorized by age and gender, giving them an expiration date long before they wore out,” he says. “There was also a flood of licensed toys, with the story already written. I wanted to create something more universal and inclusive that could grow with children and leave them in charge of the story.”
Alex Hochstrasser’s sketches for the first Bilibo. Illustration courtesy of Moluk.
Firsthand observation of play and repeated rounds of testing shaped the toy, along with input from child-development experts. “The final step in the design belongs to the children,” Hochstrasser explains. “They become the co-inventors, deciding what the object is and what it can do.”
How Bilibo Took Shape
Early studies drew on archetypal forms like eggs and turtle shells. “What interested me was how a hollow hemisphere’s behavior changed simply by turning it over,” Hochstrasser explains. “Resting on its rim, it was stable, a hill to climb or a shelter for things underneath. On its rounded base, it became dynamic, a vessel that could rock and spin.”
Photography courtesy of Moluk
The shell’s threefold symmetry allows two identical pieces to lock together into a cheerful sphere. The two openings read as eyes, lending the object personality and a sense of direction—but they also work as peepholes, anchor points for a pull rope, and spouts for pouring water.
“Each detail had to contribute to both its character and its possibilities for play,” he says. “I wanted the form to feel friendly and familiar, yet odd enough to make children curious.”
Bilibo appeared in ‘Century of the Child’ at MoMA in 2012. Photography courtesy of Moluk.
The deceptively simple design soon attracted attention beyond the toy industry, earning a Design Distinction in I.D. Magazine’s 2002 Annual Design Review, an honor the first Apple iPod also received that year. Bilibo went on to appear in MoMA’s Century of the Child: Growing by Design, 1900–2000 in 2012 and enter the permanent museum collections in Zurich, Brussels, and Paris.
25 Years Later, the Play Continues
Bilibo Midi brings a lighter, more compact shell to younger children, with room for a 2- or 3-year-old to sit and spin. It’s also easy to carry, even when filled with sand or water.
Bilibo Midi toys as stepping stones. Photography courtesy of Moluk.
“A modest change in size can make a big difference to how independently children use an object,” Hochstrasser notes. “When we tested Midi, it was striking how naturally toddlers picked the shells up or used them as stepping stones—no help needed.”
Alongside the smaller shell, Moluk introduced Bilibo Dots, a set of 36 counters, each carrying the original’s curved profile and two eyes in miniature. They can be sorted, counted, threaded, or tossed inside the original Bilibo shell to rattle around.
Bilibo Dots. Photography courtesy of Moluk.
“I see all MOLUK toys as a family of building blocks for play, designed to work together so each new addition opens up possibilities for the others,” Hochstrasser says. “Put a handful of Dots in a Midi, and it’s a treasure chest.”
The Classic Bilibo also comes in four special-edition colors for 2026–2027: amber, emerald, graphite, and coral. Aside from new colors and a 2021 retooling that made it lighter and stronger, the original has retained its form for a quarter century. Children who grew up with Bilibo are now watching a new generation discover it.
Photography courtesy of Moluk
“Longevity depends on both the toy surviving and children continuing to find new uses for it,” he says. “Bilibo has no batteries to replace, no screen to update, and no mechanism to break. It’s a simple but distinctive shape that changes character depending on how you position or look at it. It invites rough-and-tumble physical play—rocking, balancing, spinning—and can just as easily become a drum, a boat, or a cradle in a child’s imagination. The object stays the same, but the play it enables keeps changing as the child grows.”
