This outdoor activity table is perfect to keep children entertained but whey not in use it doubles as a coffee table. Build it with these free plans.
At the link you can download the free woodworking plans to build this childrens train or lego table.
This train table is very versatile. By flipping the table top you have a great drawing surface. It also features storage underneath and on each side of the base. You will need 1/4 sheet of plywood to build it. Free plans at the link.