I'm not sure when this trend started, but lately you can't say "first birthday" without someone mentioning a smash cake. It's just a thing you do now. I doubt I even got to eat cake at my first birthday, and now little one year old's everywhere are getting their very own cake. Meticulously baked and decorated... only so the child can smash it to pieces while trying to get a bite in their mouths.
It's as cute and messy as you can imagine.