Simply sensational: A tricycle that morphs into a bicycle — on the fly!

Talk about original: American designers Scott Shim, Ryan Lightbody and Matt Grossman last month won the grand prize in a bicycle design competition held by the Taiwanese government.

Their Shift bicycle (above and below) is a children's training bike with paired back wheels that splay when the bike is at rest.

When the bike is moving an articulating hub draws the wheels inward to mimic a single wheel and "make the aesthetics cool," said Shim in Bradford McKee's short piece on the bike that appeared in yesterday's New York Times.

Waycool.