Connect the Lego WeDo Alligator model then try to get the cat as close as possible to the alligator without getting bit. Don't get your finger too close to the hungry alligator.
Requires: Scratch 2 browser plugin from: http://scratch.mit.edu/scratchr2/static/ext/download.html. Scratch Lego WeDo Extension (Shift+Click on "More Blocks")