Incoming Resources
- The way things work:, a Millimages, Pearson Broadband and Schlessinger Media coproduction in association with France 5, ZAF, TVO, TFO
- Levers and pulleys, produced by Disney Educational Productions ; series producers, Kathy Kachta, Dan Staedler
- Levers, Dwayne Stilwell
- Making machines with levers, Chris Oxlade