When you've made your mobile, ask an adult to help you hang it up. If you're hanging your mobile from a lampshade, make sure that it's well away from the actual bulb, so that it doesn't cause a fire hazard (light bulbs can easily get hot enough to burn plastic, wood or paper!).

If you've made the outdoor mobile, remember to select a sturdy branch or other fixed location to hang it from. And make sure that you hang it where nobody's going to be walking, so they don't hit their heads.