"I purchased this set for my 5 year old son. We were both excited to see the helicopters fly. After the build we went out to test the helicopters. We went out to a Park with an open field, we did not want the helicopters to get stuck on a tree or on anyone’s roof. The first attempt , with all of the figures and cockpit I place failed to take off. My son’s attempted to pull as hard as he could and no take off just a controlled fall from his outstretched arms. We tried from a higher surface to give it more hang time. That was not the solution. Second attempt, no figure in the cockpit. Same result, did not take off. Third attempt, no cockpit cover no figuring, failed to launch. My son loves the plane, the building of it, the fox image, the fact that the figuring is named Rivera, just like he is. But we are both disappointed that the helicopters did not launch. Really bad design. I’m going to have to request a refund."