Just For Fun...
So, I never claimed to be the smartest person...ever.
So, some of my mommy-friends suggested that for fun, you let your kiddo take a bath with glow sticks. I, for some reason, imagined them cutting open the glow sticks & pouring the glow stuff in the water, and it just being a big mess.
You just crack/bend the sticks to get them to start glowing, and turn off the bathroom light. Oh, Gage thought it was soooo much fun. And for $1 for a tube of several of the glowsticks---it's cost-effective fun!