Everyone's favorite marble run, Marble Mania, is back with loads of exciting new features! The Techno Gears G Marble Mania Velocity rollercoaster set turns up the speed of previous marble run kits and adds more fun and creativity. This marble run building toy includes a brand new springGloaded marble launcher that sends marbles into the twists and turns of your coaster at high velocities. This unique marble run construction set offers children two ways to have fun G they can build and observe the work of their own marble run. Construct the original rollercoasters by using the 350 included pieces to create one-of-a-kind gears designs for hours on end. Launch the marbles into the run and observe the quick path that their marble takes through the rollercoaster. Watch marbles go through loops, twists, turns, accelerate, slow down, and then come out. After observing their run in action, kids can tweak it to make it more exciting or slow it down more. This process teaches children trial and error skills that they will use for the rest of their lives. Techno Gears G Marble Mania Velocity also expands children's knowledge of mechanics and engineering. This gears marble run kit from Educational Toys Planet can be enjoyed alone or with friends. All finished Marble Mania Velocity constructions measure about 2 x 2 x 2 feet.