My kids did the classic style ones. They had a blast doing the designs and helping to harvest the seeds (toasted and eaten with smiles). Young kids love to rip the guts (seeds) out of a squash for some reason. I think it's a built-in trait. I did the tree on the zucchini just for kicks, while I was cooking dinner. I used my old boy scout Swiss army knife. A good way to kill five minutes between tossing roasting pumpkin seeds. Lots of fun for sure.