"Powered by Condensation Nuclei"
Sure, it's a bit geeky - making a design about the particles that water condenses around to form clouds. It may confuse some people, but you'll get a good laugh from those who 'get it'.

For more details, click the "View Larger Image" link below.

View Larger

Condensation Nuclei Magnet Powered By Condensation Nuclei (you know, the particles around which water condenses and thereby forms clouds!) A bit geeky sure, but so what. (poweredbytshirts.com) $2.25 Qty:    AVAILABILITY: Product Number: 29869948 Tell a friend about this product! Product Information Stick "˜em up with our fun and functional magnets. Holds refrigerator notes, photos, dress up a school locker, room or workspace. Adds stylish fun to any room. Collect "˜em, trade "˜em. 2.25 inch diameter Metal shell Flat magnetic back Mylar/UV protecting cover