This one of a kind center allows you to create a garden, a butterfly house, ladybug habitat, or whatever science project you wish. A spacious learning environment for your entire classroom. A 5" diameter screw-on cap provides easy access. Comes in blue frame only, with a Mega-Tray, vent plug, and super plug. Remove the dome and turn the center into a Sand & Water Center. Easy to move on (4) 3" locking casters. 2 snap-on caddies are included. Some assembly required. 33"H x 21"W x 21"D.