talls, that was made for a woman that lost her ability to walk cause of cancer. she got rid of all the cancer but she could never walk again. so her husband came up with an idea. he took some madtracks and put them on her wheel chair. why? cause they both, with their kids really liked to go to the dunes. she wanted to be able to drive around with her kids and not have to be lifted into the buggy every time. so she could cruise around. she never gets stuck, and ever pulls out a lot of trucks that get stuck. its kind of cool.