Lightweight , low profile tub tables for tactile experience with sand, water, rice, grains or myriad shapes, textures and viscosities. Each tub is 16"l x 11.5" w x 6.75"h with its own snap on lid. Easily removable for emptying or replenishing. Sized right for new walkers thru 23 months. Easy assembly (no tools required) with anti-slip heavy-duty rubber floor protectors.