Zoo Architects: Build a Cage for Your Animal

In this hands-on STEAM activity, students take on the role of zoo architects. Each group picks a favorite animal (real or toy), then designs and builds a cage to house it. The cage must have four corner platforms of equal height — each made by stacking 3D solid shapes (cubes, cuboids, cylinders, spheres, prisms, pyramids) — strong and tall enough to hold up a "roof" (a piece of cardboard or a book).

The magic of this activity is that there are many right answers. A platform could be one tall cylinder, or three small cubes stacked, or a cuboid topped with a triangular prism — as long as all four platforms reach the same height and stay standing when the roof is placed on top, the cage works.

This puts students into authentic engineering thinking: they will quickly discover that spheres roll away, pyramids can't hold things on their pointy tops, and flat faces matter for stacking. They will also discover the mathematical idea that different combinations can produce the same result — a foundational concept in early arithmetic and algebra (e.g., 2+3 and 1+4 both equal 5).

The activity ends with a comparison discussion where groups visit each other's cages and reason about which animals could fit inside which cages — a real-world application of measurement and conditional logic.

Suggested duration: 60–80 minutes (can be split across two sessions: building day + redesign/discussion day)

Group size: Works best in pairs or small groups of 3 — encourages collaborative problem-solving and shared discovery.