During the three days that it was actually cold around here last month, Norah and BVZ conducted an "experiment." This consisted of leaving multiple cups of water outside in different places and different containers to see which would freeze. It was a big hit and Norah now frequently comes up with new experiments to try.
The other day she wanted to see if toilet paper would dissolve faster in hot or cold water. As it turns out it doesn't fully dissolve in either. Imagine the disappointment.