So, in my infinite wisdom, I tried to vacuum them up, but they clogged the canister, and I couldn't figure out how to open and empty it. (Where's Tim when you need him?! He is the vacuum king. He treats that Dyson better than our pets. Seriously). Probably more upsetting was seeing how much dirt was in the canister that evidently had previously been in my carpet. Oh well - best not to think about that.
I finally figured it out and continued trying to suck up all the little balls. It took the better part of an hour. But on the positive side, I learned a valuable lesson, (don't fill beanbag chairs while Tim is gone, because you may need him to figure out the rocket ship vacuum), and, Nicky thought is was great fun!
He learned a little science, too, like the unique physical properties of styrofoam. It sticks to you like magic!
He was a great helper - although, we determined that picking up thousands of little balls one at a time wasn't really time-efficient.