A shorter, simpler care sheet targetted for a children is a great idea. But it seems a lot of this thread has digressed into aiming for something we already have.
There already is a comprehensive care sheet for beginning and experienced crabbers, that is already generalized for all crab species, which is already split out into different sections for substrate, food, molting, etc., which already ends with a Checklist with reasons for each item, and has already gone under board approval
As for a care sheet that goes into lots of detail and includes lots of pictures, well that's not really a care sheet anymore, it's either a full-blown website (of which there are several), or a full book (of which there are several, including one that was written by members of the HCA and is highly recommended).
There also already is a species-specific care-sheet for C. Variabilis/Crazy Crab (i.e. Aussie) in the CareSheets links, though I'm sure you could add more information to it.
JMT.
Stuck-up, half-witted, scruffy-looking crab-herder since '92.