This is a very cheap Hitch made with a swivel caster, a bracket for antenna poles and a piece of square iron pipe. To be fixed under the bike saddle. Great just because it allows the movement on three axes, so there's complete freedom while biking.
Simple No-Weld Bike Trailer
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You can actually create a great hiding place for cash in the top of any interior door. You just have to drill a hole and insert a metal tube that will keep cash and smaller items out of view. This is a great place to hide jewelry and anything relatively small and you can stash away some extra cash to save for a rainy day. Use a magnet to get it back out. (NO HOW TO, ONLY PHOTO)
Pedal-Powered Washer Needs No Electricity and Costs Only $40 More