I told a friend that chocolate bars sink. "What about Aero bars?" she asked.
Aero bars! I hadn't thought of that English delicacy since my exchange student days, and the idea was tantalizing. So the next time we visited Canada, I persuaded my husband we couldn't recross the border without stopping for Aero bars.
Here's the result:
They float well. (Not that surprising, since an Aero bar is just a chocolate bar with lots of bubbles.) Even better, a gentle nudge sets them spinning nicely.