Here's a trick that you can use at a cookout.
Volunteer to help and grab the job to open the packages of hot dogs.
Then, use a knife to make an X in the end of each hot dog like this:
Image: Hot Dog SIDE VIEW and END VIEW
Image: Hot Dog AFTER
When the hot dogs are cooked on the grill, the ends will pop open.
Kids love them!
Chris Brogan pointed me to Grace Piper's link the the Chow: Spiral Cut Hot Dog!
I'll have to try that one. ;-)