Air Power
In each episode of Boohbah, the children give a present to the Storypeople, which they deliver by blowing on it until it rises upwards into Storyworld.

Directions
Let your child try to keep a feather floating in the air by blowing on it. If you have two feathers, you might have a competition to see who can make the feather go higher or who can keep it in the air longer. Time how long your child can keep the feather in the air. See if you can measure how high she can blow it.

Then present other items and ask your child to compare each to the feather and predict whether it will be harder or easier to keep the item in air. Then let her test the hypothesis.