All-in-1 STEM/STEAM activity center table play set transforms between a brick block play set, marble run kit, study desk, and a sandbox & water-tight container for Sand & Water Play. Tabletop is building block ready with 4 built-in base plates and when play time is done can be flipped to a smooth desktop surface. Features plenty of storage in the underneath compartment and includes 2 handy containers that can be attached on the sides of table. Includes 250+ classic bricks, 50+ large bricks, 20+ marble funnel runs and slides, and 2 brick removal tools. Works with other brands' classic and large sized construction building brick block sets. 16.5" L x 12.7" W x 16.8" H. Legs can be removed to place the table top on ground level.