The common smoke bomb is an item perfect for neighborhood hijinks and airsoft wars. With this video tutorial, learn how to make a smoke bomb from a toilet paper tube, potassium nitrate, and sugar. Wrap the cardboard tube in duct tape to protect from heat. In a stovetop cooking pot, combine 60g of Potassium Nitrate with 40g of sugar and heat at a low temperature for 35 minutes. Enclose the mixture into the tube for approximately one hour. Wrap the contents in duct tape and puncture for the addition of a fuse.