Create an observation play area in your classroom or home with a self-contained space for study and discovery! Sturdy, 5-piece plywood system includes acrylic magnifier, plant and grow unit, touch and see unit with clear acrylic panel and mystery opening, habitat unit with sliding acrylic panels, and mobile base with casters. Each unit has handy built in handles for easy stacking and movement. Materials: Birch Ply, Hard Maple, acrylic, plastic.