Cardboard can be used to make nearly anything, including toys, playhouses and dioramas. The type of glue you use depends on a number of factors, including the thickness of the cardboard and what it will be used for. Children should have adult supervision when using glue.
Plug in the glue gun with a glue stick in it. Wait for the gun to heat up.
Layer the edges of the cardboard you want to glue together. Remove any debris or dust that could interfere with the glue.
Squeeze the glue gun trigger and lay a thick line of glue along the length of one of the edges you want to attach. Set the glue gun aside.
Press the edges together firmly and hold them in place for at least one minute. Lightly loosen up your grip to see if the cardboard gives. If it does, continue holding the cardboard together until the seam holds.
Give the cardboard enough time to dry before attaching another piece. Unplug your hot glue gun when you are finished and wipe the nose with a clean cloth. Check the cardboard for any strings of glue and pull them off. Add glue as needed to reinforce the seams.