could do bug obstacle course DIY American Ninja Warrior Backyard Obstacle Course - Five different elements. Build and re-build this obstacle course, and then it breaks down for storage. Storage ideas in the post.
Whether you're training to compete or just want to increase your fitness, you can do it in a fun way with the whole family on this DIY backyard American Ninja Warrior style training course! Details from GirlMeetsCarpenter
LEGO Ninjago 70734 Master WU Dragon Ninja Building Kit
How to Throw an American Ninja Warrior Birthday Party!
Popsicle stick bombs are quick to make and fun to throw. The boys thought it was cool that they are kind of like ninja stars, and they loved how the sticks fly apart in all directions when they hit something.
How to Make a Ninja Mask Out of a T-Shirt in Just 5 Easy Steps