The Ice Molds set comes as a package of four.

Ice molds are great tools for both sensory and construction-based investigations. Ice cubes of various shapes work great as a new way to experience block play. Stacking and building get interesting as the ice melts (or sticks together), creating different shapes as the play continues. The cold touch and slippery surface incorporate sensory play right along with engineering practice.

You can even add food dye to the water before freezing for colorful explorations as they melt and mix.