Cut cardboard with an electric carving knife
Ha! We should all have such smart, practical friends! From Melissa:
I was given an electric carving knife as a wedding present with a note that went something like this: This is great as a carving knife, but even better for all those times you need to cut cardboard for your childrens' projects. I have yet to use the knife for my own children, but as a teacher I use it all the time. So nice and easy!