What is making the balloon get bigger?

Annie is blowing soap bubbles. What is inside the bubbles?

Connor is blowing up a bicycle tire. What is he pumping into the tire?

What will happen to the balloon when the needle touches it?

This is a hot-air balloon. The burner has been turned on. It is making the air inside the balloon hotter. What will the balloon do?

What is inside these balloons?

These soap bubbles will touch the cactus. The cactus has long, sharp needles. What will happen to the bubbles?

Jacob is learning to swim. He has arm bands on. The arm bands are blown up. They are full of air. The arm bands help Jacob to _____ in the water.

The bouncy castle is made of big plastic tubes. What is blown into the tubes to get the bouncy castle to be the right shape?

These children are enjoying being in a wading pool. Before they can use the wading pool, it has to be _____ __.