Since my son is allergic to peanut butter I just used this as an idea for the kids lunch. We let them pick what they wanted in it and let our older daughter flatten the bread. If you microwave them just a little ( if you have cheese) they stick to each other better. Or if you used something like ranch dressing, celery and cucumber strips they stick. We used cheese, turkey and ham.
I made this for a baby shower because during the mom-to-be's pregnancy she was obsessed with peanut butter, and we live in Japan, so it was a fun, creative hit. It was easy and taste okay.