Balloons

 This was so comical, the twins learning to blow up balloons.  Ava realized she could do it first and of course Harper was right behind her.

 They were concentrating so hard, I was trying not to crack up watching them.

 Once they mastered it though, it was wild, they blew them up and let them go and laughed so hard, over and over again until I forced them to take a break.  I started to explain how they needed to rest their lungs, but Ava flopped on the couch and said she already learned about that from her P.E. teacher..

Harper popped one when she went to write her name on it, and that was the end of balloons until tomorrow.  When they were headed for bed, Harper asked Ava if she was exhausted from blowing up balloons, Ava said she was.  Now they need to learn to tie the balloons.