I promise it isn't oval shaped either - must be the angle I took the photo. It's a 6" square white card, topped with red card and then a cut down a page from a 'freebie' little road atlas that came with a Sunday newspaper. The car is decoupaged (can't recall where I got it from, but possibly Hobbycraft) and I just printed the L plate from the internet onto glossy photo paper and tore it in half.
A simple card for a very happy young chappy!!!