I've been making these for years and years and years. I use croissant rolls and pizza sauce. Serve with remaining pizza sauce for dipping. The kids loved them when they were little and still ask for them now.
healthy flapjacks-made similar ones for my little one before and I loved them too ! Add some nuts and goji berries and they're my perfect work snack. You can change the recipe a little and add different things to make it more exciting ;-)