Recently i bought a FUJI HS-10 camera. A small step up from my good old Canon point and shoot. One of its neater features is that it can take high frame rate video. The size of the video shrinks as the frame rate increases. Theres not much technically to describe about this - set the framerate, point, shoot... The only thing to bear in mind is that it requires a lot of light, so this really works best outside.
Still, it lets you do fun things like take videos of popping balloons.