Using Picture-Perfect STEM Lessons: 3-5: Using Children’s Books to Inspires STEM Learning in your classroom is easier than ever! NSTA’s ClassPacks, each sufficient for a class of 28 students, are lesson-specific collections of materials—an unmatched time-saver and a great deal. This ClassPack for the book chapter “Wind It Up” in Picture-Perfect STEM Lessons: 3-5: Using Children’s Books to Inspires STEM includes:15 Wind-up toy robots, 1 Small screwdriver set, 1 Protective gloves, 1 Assorted Springs, 101pc, 1 Clothes pin, 30pk, 1 Wooden spool, one size, 2 Wooden Spools, 72pk, 3 Pencil, dzn, 1 Rubber bands, asst'd, 1/4lb, 1 Assorted Washers, 1 masking tape, sticker sheet, 1 Box toothpicks, 1 Box and Overshipper.