I was rummaging thru drawers as I'm getting ready to move in a couple of months, and I came across a pizza cutter that is old, well worn, and brought back a lot of memories.
When my 3 kids were small, I would make peanut butter & jam sandwiches. line them up, and then run the pizza cutter down the middle. then it was easy to do one pass the other way and all 3 sandwiches were cut.
That pizza cutter was also used on pancakes and waffles. It also made a handy cutter for pie crust. Of course, these days, the Pillbury Dough Boy makes mine.
Nice thing about it is your hands don't get sticky, and I can toss mine in the utensil compartment of my dishwasher.
Oh, one more handy use: pizza!