Here is a super-easy project that is sure to be a hit. You probably have everything you need out in the garage already. Just use duct tape to attach a paint roller to your leaf blower of choice. Install the ammunition and you are ready to go.
Great for adding a little excitement whenever you like. Hint: for a little extra surprise, hide the blower behind the couch pointing upright. Plug the leaf blower into an outlet that is switched at the wall (with a light switch). Sit back and wait.