Tcl is an excellent tool for educational purposes:
then you may be interested on Robbie the Robot or Turtleshell
- What about teaching some mathematical concepts?
Try a triangle toy,Triangle Madness or, in Playing BLT you will find an interactive function plotter example.
- You can also take a look of: Who Wants to be a Tcl Hacker and customize the questions and answers to any subject and have some fun with your students.
*There are also pages for the little ones, like [Dot to Dots] or [a balance toy].
There are much more you can take advantage of right here, with The Cool Language.