DIY Newton's Cradle from a shoe box
Mini Newton's Cradle
DIY Newton's Cradle - a little grownup-ish
STEM Challenge: Learn about Newton's 3rd Law of Motion and then build a device to prove it! Here's a fabulous challenge to build a Newton's Cradle!
Huge Newton's Cradle
Newtons Cradle Balance Balls DIY Technological Making With Glue Taschyshop http://www.amazon.com/dp/B00N6T7T92/ref=cm_sw_r_pi_dp_aP7Cub0NSYKFT
How to build a quantum Newton's cradle