Protecting your keyboard from your toddler

I plan on taking my laptop on a flight with my toddler. I want to show her movies on the plane but she has a nasty habit of banging on the keyboard. So I have been looking for a utility to disable the keyboard while a movie is playing. 

I tried the following utilities:

ToddlerKeys- This utility is perfect, but it looks like it does not work in Vista

ChildProof- I couldn't get this to work. 

The program that eventually ended up working is

Kid Key Lock

http://www.100dof.com/kidkeylock.html

This program works perfectly!