This store is in Chicagoland, but they ship all over...The offerings are based on the PBS series, Magnificent Mind at any Age.
I'm sure that anyone could dispute the science behind it, but sometimes things are just plain fun..and that's good enough for me.
Indulge in the website...www.marblesthebrainstore.com
The Marbles is as in losing your marbles....I can relate!
Be kinder than necessary, for everyone you meet is fighting some kind of battle..