Well it involves marbles and pool noodles....
I got the idea on pinterest and it was so easy and fun. You just cut the noodles in half and keep them together with tooth pics. Simple as that!
Of course engineer Boston decided to change the track and make it even better. I know he's gonna be some kind of architect or engineer when he grows up. It's amazing how his brain works.
Best part: this entertained them for hours. $3 spent = SCORE!!!