Answer:
These are great, floaty fun until they explode and give you a little scare.
I can be moved. I can be rolled. But nothing will I hold. I'm red and I'm blue, and I can be other colors too. Having no head, though similar in shape. I have no eyes yet move all over the place.
Perhaps the most important adjective for ballerinas and princesses.
What is born long, dies short, and spends its life leaving a trail?
It get wetter and wetter the more it dries
As round as an apple. As deep as a cup. All the king's horses can't pull it up.