Grow your own crystals with starters like salt, Epsom salt, Borax and sand. Observe what grows in two weeks. Which starter works best? Enter your data online (teaspoons of starter and number of crystals), then compare with others who tried the same experiment.
Related Activites from How To Smile
Try out the related activities listed below from 24/7 Science and other sources. Be sure to visit Howtosmile.org to find even more science and math activities on the web!