Clear, tuff, nine-inch deep acrylic tub provides an interesting perspective on sensory play. Great for teaching lessons such as floating versus sinking. Bottom drain valve makes clean up a snap. Cover includes Lego® compatible plate so this item can pull double-duty as a play table. Baltic Birch frame fits easily through classroom doors. Heavy-duty, locking casters for mobility. 20.5"W x 20.5"D x 24.5"H