You just have to decorate them yourself ....
(these are probably just a third of the extras 😩)
... and then sell them at bargain basement prices at school cake sale!
So, if you're planning a mermaid themed birthday party anytime soon, pop over to my kids' school on Thursday morning and pick up a few dozen of these ocean creature cookies at half the price they'd normally be sold for!
And in case you can't get there, and want to reproduce them yourself:
SweetSugarBelle has a great tutorial on making mermaid tails and Sweetopia has a lovely post on making Seaside cookies (including a jellyfish.)
As for the rest, well... next time come join us for the class 😉