How to remove all files with a certain extension

[John Almberg]

This is a real newbie question, but I can't figure it out...

I want to remove all .tar files from a directory tree. I think  
something like the following should work, but I must have something  
wrong, because it doesn't:

find . -name *.tar -exec rm /dev/null {} \;

What am I doing wrong?

Thanks: John