In Maggie's science class they need to invent something. The example that they gave was if you wanted to open a door, instead of opening it by the handle, their invention might have marbles rolling down a tube, hitting a toy car that bumps into books that fall over that somehow opens the door. It is called a "rube Goldberg machine" I think. The kids have two weeks to design and build this. They are working in pairs. Maggie and the girl that she is working with are going to invent a way to get hand sanitizer out of the bottle.