It's neat now the stores sale a smash cake along with the birthday cake. I don't think you are too old to do it. Some people even smash cake from the big cake why do that when you can get the little smash cake.
No I never did that but would love to and now almost 60 I think its about time I do! One of my nieces 1st birthday party was given one, and that is exactly what she did, smash her hands and face into. It looked like fun then and remember at the time that I wish I could do that too!
I've never heard of a smash cake. I don't think I've ever smashed my face into a cake, even as a child. I also can't see myself having one at the age I am now... I hate things on my face, so I definitely wouldn't smash my face into a cake.