There's also the Egg Decorating Competition. It's supposed to be 'make two holes in an egg, blow out the contents, then decorate it with patterns in felt tip or smeared scraps of crepe paper or make into a character by sticking on bits of felt to give it clothes or bunny ears', but it turns into 'create a multi level diorama with assorted characters animated with the assistance of Lego Technic because Dad's got himself involved with this one'.
I won the bonnet competition with the assistance of some yellow fluffy chicks, shredded tissue paper and a hat that came from my recently deceased grandmother with two lengths of ribbon stapled onto the back and then, two years later, the egg one with two eggs, one a scientist (I drew glasses on it and gave it cotton wool beard and hair), one Frankenstein's Monster, the lid of a shoe box and half a packet of drinking straws. It was a Science Eggsperiment (yes, I know, but I was 11 and thought I was a genius for that).
Even then, there were clearly entries made by parents.
Just you wait for the holiday homework project. There will be miniature versions of War and Peace and longform essays all word processed (because otherwise you'd see that the kid has had nothing to do with the the thing) and, hopefully, one where the parent's persuaded the kid to write small paragraphs that can be stuck onto a sheet of A3 with a nice image/collage because 'a poster presentation is a perfectly acceptable method of conveying knowledge' and I'll be damned if I'm going to let the teachers set me homework