I do use flashcards to teach Yusuf. Here are set of islamic flashcards that I made for my son.
I have also printed the prayer position cards, thanks to the sister Umm Abdul Basir and other sisters/brothers. I can't quite locate other prayer pictures on the internet other than the ones sis Umm Abdul Basir made, subhanAllah. They were either from french or turkish websites.
Get your prayer position cards here, you will be redirected to Umm Abdul Basir's blog.