Here is a collection of more games for kids that you can use as an educational tool.This list will be updated regularly so please use the RSS subscription tool.
Most of this games are written in Java so you do not need to download anything.Just CLICK on the link and play.
You can play right away or start first with the LEARNER page.Also,you will find more help in the HELP and INSTRUCTOR pages.
You can download a full version that will work for 14 hours or you can try Phun,a the previous of Algodoo which is still free.
You can see here a short video about this amazing program:
Crayon Physics Deluxe