at the download page at modthesims:
1. no direct instructions for install.
2. nobody in the comment section has any problems that i have, just version problems.
3. there's just a link to modthesims' guide to installing mods, which is very vague and does not have any troubleshooting for invisible mods.
i do not know what i have done wrong, first i put back all the missing folders in the mods folder (i ran mods perfectly fine before, it made no difference) secondly i checked my version and it is the very newest version, should not have incompatibilities, and finally all my other mods work except the mods from modthesims.
or, should i just ask them? i do not have an account there, but i can if i have to...
Edit: just tried deleting the Simcompositorcache file and Scriptcache file. nothing. 2 more things off the list.
the mod adds animations and allows actions children cannot usually do.
i am slightly confuzzled now.