After a visualization or meditation with children, it is always good to reflect. Give time to the children to express what they are feeling in the moment. Let them tell you if it was difficult for them or easy and enjoyable. Let them tell you what they saw, what they heard, and most importantly how they felt. Allow them to write or draw their experience. For the "Balloon Ride Script" mentioned below, I put together a guided Free Draw Worksheet - great for the little ones!
And just for fun...balloon-asana!