Duct tape and cardboard sword - this will be good for our Pirate adventures.
Emergency Duct Tape Keychain
10 Creative Home Hacks That Will Improve Your Life
Old Sneakers as Ladder Bumpers - You could buy special rubber bumpers for the tops of your ladders to protect your siding or walls, but why? A pair of old sneakers (who doesn't have some!) and a little duct tape will do the job just fine.