I love that it is simple and different. And, they're small (2" h x 1" w) - so they'd probably be perfect for the top of our little cake. I think we're going to have a small round cake at the top of our cupcake tower - so we can do the whole cake cutting thing.
Which leads to my next thought - what do you think of couples smashing cake into each other's faces? I think it can be funny but I think we'll pass on that - I would not want cake all over my face! LOL.