"What?" I replied.
"We made a rocket balloon!"
That sounded interesting. "How did you do that?"
"We took 1000 centimeters of kite string and attached it to the top of the flagpole. Then we staked the other end on the ground, so it went up at an angle."
I didn't want to know how they got the string to the top of the flagpole. Hopefully they raised it like they would raise a flag, and nobody had to endanger their lives actually climbing to the top of it.
"Then what?" I asked.
"Then we attached a balloon to a straw and attached that to the string. And guess what?"
"I got to blow up the balloon."
That didn't surprise me. He has the most hot air, I'm sure!
He continued. "You should have seen that thing rocket to the top! It was awesome!"
I'm sure it was. In case you'd like to see one of these balloon rockets in action, you can watch the video. (I'm sure my son's version was even way more exciting than this!)