DESC: Hours of hands-on experiments designed by a team of Harvard graduates, scientists, educators, and parents. Award-winning winning science kits designed for children between the ages of 5 and 12. Each set contains a 8 1/2" x 11" instruction booklet with dual instructions, one for adults and one for young scientists. Dr. Toy 100 Best Children's Products, National Parenting Seal of Approval, Teacher's Choice Award National Parenting Publications Honors Award, Learning Research Institute Outstanding Resource Award, Manufacturer: The Young Scientist Club