This is quick because I'm running behind today but these don't look like Moms or nursery items to me. They look more like teens and young adult art, and I'm not sure if they buy off Etsy. (I really don't know because they're not my market.)
I think these would most appeal to urban folks, like NYC or Chicago. Photos are dark and make the characters look menacing. I would lighten them a lot and make the overall shop look or ambiance as friendly as possible. Make the text friendly too. They're very good renderings, but first impression is that they're also scary. Tone that down some, or guess who wants scary things around and make that your target audience.
(You might guess I'm not one for the skull and crossbones either.)