3 yrs. & up. The GIANT Encyclopedia of Science Activities for Child: Over 600 Favorite Science Activities Created By Teachers For Teachers by Kathy Charner (Editor). ISBN-13: 978-0876591932. Leave your fears of science behind! Respond to children's natural curiosity with over 600 teacher-created, classroom-tested activities guaranteed to teach children ages 3-6 about science while they are having fun. 575 pages.