The Humble Weekly Bundle: Get Your Learn On features a handful of educational games that will help work out that brain of yours!
Right now you can pay what you want for Type:Rider, Ludwig, and Crazy Plant Shop. Any payments over $1 USD will unlock Steam keys. If you pay more than the average price (currently $5.58 USD) you can tag on Sokobond and Influent + Language Pack. If you pay $9 USD or more you can pick up all of that plus Contraption Maker and The Counting Kingdom.
Humble offers games at low discounted prices while also putting a portion of all payments towards supporting charity. As always, the customer can split their payment between charity, game developers, and Humble tip.
Check out the Humble Weekly Bundle: Get Your Learn On here: //www.humblebundle.com/weekly