I'm not sure why I make these kinds of posts when I have actual stuff I need to get done (probably because I underestimate how long it will take me) but hopefully it will help someone besides just myself. Probably not though since I don't optimize for Google and this will never show up in a search. But anyway...
Here are some picture books that can help support teaching various mitvot. Some may be more of a stretch than others. For example Mama Don't Allow does not discuss manners at all but it could be used to discuss when it is and isn't ok to be loud.
Also I totally admit to a personal bias. There are no Berenstain Bears because I dislike them so much but as you can tell by this list, I do love Little Critter.
Visiting the sick/bikur choleem: