The other thing my local hospital said they always need was knitted breasts (!) for community midwives to use in breastfeeding demos. I was a bit ????? but there you go!
You can use any colour yarn, they don’t have to be human-coloured! However I did use up some (to me) rather nasty pink.
Example here.
They are quite simple to knit, though can also be partly crocheted.
If anyone would like the pattern please pm me.
BTW I originally emailed the local hospital’s volunteers/fundraising dept.to ask about twiddle muffs - they replied very quickly.
Not long ago they did also ask me to knit some ‘forget me nots’ for dementia awareness, but alas I found them far too fiddly for me.