How to Make a simple and powerful Knex gun
There are an infinite number of things that you can make out of K'nex. A disproportionate, but entertaining, number of these are toy guns. This video features an innovative design for a powerful K'nex (it also has a rubber band in it) gun that shoots small K'nex pieces across a room accurately and with a lot of power. It may not look like a gun, but it works!