I use a pizza cutter for pretty much all of my kid-food chopping. Chicken strips, toast triangles, even pizza!
After cutting the pizza into wedges, I cut up to, but not through, the crust.
Then I cut it across until I have it all in little squares.
I am left with a tasty crust piece that I can steal for myself if that child is too young to notice. a hem! I mean a young child could choke on the tough crust.
I also use it to make Logan's Monkey Bread. I have to quarter the biscuits in the recipe, so I just use the pizza cutter and it makes the job much easier. So dust off that pizza cutter and keep it handy.
Amazing what happens when we think outside the box. Even if it is the pizza box!