Incoming Resources
- Machines go to work in the city, William Low
- Bulldozers, David and Penny Glover
- Mighty machines picture puzzles, by Matt Bruning
- Wedges to the rescue, by Sharon Thales
- Build your own chain reaction machines, how to make crazy contraptions using everyday stuff : creative kid-powered projects!, Paul Long
- Machines go to work, William Low
- Pulleys to the rescue, by Sharon Thales
- Making things move, DIY mechanisms for inventors, hobbyists, and artists, Dustyn Roberts