Do you remember this Japanese virtual bubble wrap toy that was floating around in the news a while ago? Now ThinkGeek has them in stock.
Each keychain device has 8 rubbery little “bubble” buttons that makes a pop sound when you press them. Every 100th pop is not a pop at all, instead you will hear a silly sound: a boing, a bark, a rude noise, etc.
Here’s a video demonstration of the keychain toy:
The Electronic Bubble Wrap Keychain ($10) measures 1.75 x 1.5 x 0.5 in.