Using the GraviTrax Trampoline Expansion Set is easy. First, make sure you have the GraviTrax Starter Set. Then, place the angled height tiles and trampoline tiles where you want them in your marble run. When you release a marble on the track, it will bounce off the trampoline tiles and keep going. As for maintenance, just keep the tiles clean and free from dust. Avoid bending the trampoline tiles too much to prevent damage. And remember, this set is designed for kids 8 and up, so make sure younger children are supervised if they're around the toy.