Ants on a log are another fun snack to make with peanut butter. I let the kids use small cream cheese spreaders instead of knives. With no sharp edges and no cooking, let them have a ball sticking peanut butter to the celery.
At one point I had an apple bandit in my house. There would be two or three bite marks in the apples in the fruit bowl, but never a finished apple. I use the Pampered Chef apple wedger and corer to make apple slices. Then I fan them out to make a flower or sunrise shape. I put a dollop of peanut butter in the middle for a fun dipping treat.
If you have peanut butter allergies in your household, I often use pumpkin seed butter as an alternative. It is green which looks unusual, but it works for dipping and is great spread on a banana or pink lady apple.