- EdHeads Simple Machines
- EdHeads presents an investigation of simple machines, from gears and levers to pulleys and inclined planes. The site challenges students to identify simple machines in four parts of a virtual house: the garage, bathroom, kitchen, and bathroom.
- Gravity Launch
- Kinetic City uses a game format to help kids demonstrate their understanding of the force of gravity.
- Leonardo's Workshop
- Go on an art adventure as you travel back in time to visit Leonardo Da Vinci's workshop. You're on a mission to make sure that someone else who borrowed a time machine isn't causing problems in Leonardo's workshop, and along the way, you'll learn about the inventor and artist.
- Lever an Obelisk
- This interactive site allows students to manipulate a lever until successfully lifting an obelisk. It's from the PBS Online Teacher's Guide to the "Secrets of Lost Empires" program series.