@Godspee You! Baby Emperor Like a normal kids one? I think I tried one in the past that didn't stick too well but it might have been washable or something.
i just use a regular old glue stick. I've used the purple that dries clear and the white. Don't know if it's for kids. I use the toothpick so I can be deliberate in its application
You can use the hinged tape (folded down the middle) to attach the 2 side together. It is better for seam splits, but the glue on the tape is much gentler on the cardboard thank a glue stick, though still very adhesive.