Students explore essential science concepts even further—with involving book libraries coordinated to our Learning Science Activity Tubs - Gr. 4-6! Each library includes 5 paperback books that reinforce and expand on the themes presented in our activity tubs...with wonderfully illustrated, high-interest titles that make concepts super-easy to grasp. Complete set includes all 8 libraries shown, for a total of 40 books. Each library also available separately.