Froggie the Robotic Pen goes through quite a frog-like convolution just to open itself up, but it's about the most gadget delight you can get for 8 bucks. Fold it back up into itself, and it's hard to even tell what it is. Available in silver or black. It's not exactly robotic, but big fun nonetheless. See a close-up of both colors, after the jump.
We're digging that black one with its eerie-looking green buttons and trim.