TMNT wedding cake. This would go under my awesome folder, but Michelangelo isn't yellow and Venus de Milo should never replace Donatello. (Venus de Milo was the girl ninja turtle in the short lived live action show... It was horrible.)
Use a sponge to soak up concrete mix in whatever shape you desire and let it harden into a hardened version of what you just cut out! Pavers or garden accents? (I would wear rubber gloves while dipping/soaking!) Worth a try.