The waters are rough in tub sea tonight. Waves splash, bath toys bob wildly, and bubbles surround our brave captain. Ready to navigate even the stormiest bathtime, this fleet of three origami-inspired boats has a special surprise: They change color when their temperatures rise. Just dunk the hulls in warm water and watch them transform into bright new hues. Looks like convincing your kiddo to wash up will be smooth sailing from now on.