We just had to showcase this MailChimp customer. Happen, Inc. is a non-profit organization that holds art workshops for children. For example, their "Happen’s Toy Lab" has children picking out a bunch of spare toy parts, and assembling them to make cool new ones (check out the gallery in their "Toy Zoo").
The Happen Inc. email newsletter is fun and simple (and you know we like fun and simple around here). Love all the creative illustrations and logos.