Newton's Cradle Science Kit for Kids - Bundle with Newton's Cradle Toy for Teaching Physics with Toys Plus Bookmark | Newton's Laws Swinging Ball Pendulum. This science activity kit for kids includes one Newton's Cradle toy plus information sheet, poster, and more. Introduce your child to physics with this Newton's Cradle activity set. This activity set is great to teach your child about basic phsysics principles in a fun way. Sure to be a hit with kids of all ages, this Newton's Cradle set is great to give as a gift to your little one or to a science teacher to keep in their classroom. This Newton's Cracle science activity set for kids also includes a bonus bookmark for use while reading more about physics!