Have you heard of fidget spinners? Originally introduced as a fidget tool for kids with ADHD or autism spectrum disorder, they have exploded in popularity with kids everywhere! My boys heard about the (Diy Step How To Build)
This could be a fun way to create Calder acrobats! Swing From An Empty Shoe Box Project For Kids - by Krokotak - == - By Russian educative website Krokotak, here is a cool project for kids, with a tutorial full of photos that dispenses words.
Easy Fidget Spinner DIY (Free Template) - hce is a great how to make Fidget Spinners without bearings DIY. The use super basic materials and are easy to make. It includes a Free Fidget Spinner Template designs) and would be great Science Fair project