ThinkGeek is is back with her magnetic Accelerator Cannon on the laws of Newtonian science, which he certainly something that children will not notice if it meets the spirit of a budding scientists play control. After all, that's really not that difficult, done together, and a large enough to show what you look like a magnetic accelerator. It can be armed and ready in minutes without the need for glue and make a decent candidate in science fairs or in the comfort of home. Each $ 29.99 purchase comes with 10 metal balls to shoot a tool for loading the necessary instructions and half a dozen barrels for you.