Unless you have a prosumer camcorder, it's unlikely the FPS of the footage can be altered. There are programs out there that allow you to modify the speed (that do it in an more advanced way than "duplicate every fram x times") however unless you guys want to install Linux it'd be hard to find a free program to do it.
A lot of neat stuff can be done at zero budget if you're willing to get creative or do some research - film makers often share their tips of the trade on how to achieve desired effects using household items![]()