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!
Adults too.
Update:
Chris Brogan pointed me to Grace Piper's link the the Chow: Spiral Cut Hot Dog!
I'll have to try that one. ;-)