A Cannon is an item in Super Mario 64. To use the Cannon, Mario had to talk to a Bob-omb Buddy, who would activate it. The Cannon helped him get blasted off to other places.
Just an easy one-pager. You probably want to do the inside of the canon first before building the outside. Don’t put the tabs on top of the paper like in the picture, but put them underneath it, so that they won’t show.
By Mastermind777, info from Super Mario Wiki