It’s an unconventional tack, because many “low-information” swing voters assume Republicans are better on taxes — and no one likes pushing a message up a hill.

This tax offensive, however, first started on YouTube.

The Obama campaign launched a video Wednesday that busts out the crayons against McCain’s tax plan.

The online ad, tittled “Color by Numbers: Bush-McCain Tax Plan,” takes a creative approach to criticizing McCain’s “country-club economics.”

PRODUCTION NOTES: Spare strokes on an acoustic guitar accompany this child-like tour of McCain’s tax plan. The plodding pace and “coloring” sound effects probably won’t translate into a viral hit, but the message does not seem tailored to persuade, anyway. But the video is already pleasing some supporters. “LOL McSame is done,” wrote CupofJoJoBeans, a commenter on Youtube.