This Kids Modular Science Center allows you to create an observation playground in your classroom with a self-contained space for study and discovery. Sturdy, 5-piece plywood system includes an acrylic magnifier, a plant and grow unit, a touch and see unit with a clear acrylic panel and mystery opening, a habitat unit with sliding acrylic panels, and a mobile base with casters. Units (with build-in handles): 15"W x 10"D x 8.5"H.