With the Blox storage lap tray, you can stop your building projects being knocked over by securing them to the base plate on top of the tray! As well as a base plate for building upon, the tray has handy storage compartments on both sides. With Blox, see what else you can build - you don't just have to follow the instructions, set your imagination free to see what else you can create! Blox construction kits have been designed to work together with the leading brand. Warning: Not suitable for children under 36 months. Small parts. Choking hazard.