Take a walk or look out the window to count trees around your home, school or neighborhood. How many have leaves or needles? Are there palm trees or cacti near you? Submit your data online and find out where plants like these grow from coast to coast.
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!