Toddlers' Playdates: Creating Glow-In-The-Dark, Colorful Bubbles

http://chemistry.about.com/od/glowinthedarkprojects/a/glowingbubbles.htm

For toddlers, Play Doh, finger-painting, beginner tumbling lessons, KinderMusik, African drumming can be other playdate themes.

http://www.milehighmamas.com/blog/2011/07/10/a-guide-to-childrens-music-classes/