The only time when it's acceptable to give a nerd a flower.
Instructables user dhouggy wanted to ride his bike indoors but didn't want to pay hundreds of dollars for a trainer or professionally-made roller. So with a couple 2x4s and some PVC pipe he was able to craft this working homemade model for just $50.
The QTvan was especially designed for the Royal Wedding this week. Elderly folks who wish to see the happy couple without spending the night on the sidewalk can buy this caravan that's not only light enough, but made to be pulled by a scooter. Price tag: £5,500