If you are using a hot glue gun, caution should be taken until the glue cools and hardens. Burns may result.

If you are using a utility knife to cut the cardboard, extreme care should be taken to prevent cuts. Use a sharp blade and get instruction in how to cut against a straightedge.

If you choose to use the propeller, keep in mind that it turns rapidly when it is powered by the battery, so watch out for your fingers!