Terrariums are so hot right now, and this craft project from the April 2010 issue of Country Living fits right in. Their mini-greenhouse/terrarium is DIY and so stinking cute. Best part: the only materials you need are pre-fab wood picture frames.
Admittedly, it'll take a bit of work on your part (some how-to photos below), but the finished product (above - so pretty) more than makes up for the time and elbow grease.
Isn't that an awesome craft? I'm thinking this is right up B's alley... Full instructions and step-by-step instructions here.
Spotted on Love Obsess Inspire.