I love Small Magazine, an online publication "focused on independent designers and artists for children." This month I'm particularly into the "Small Guest House" feature which uses two picture books as inspiration to pick out favorite products of the season.
I've seen similar articles/columns-- decorating a room as if in x movie, or picking an outfit inspired by x print, (also fun ideas!--) but having the picture books be the inspiration seems wonderful to me.
PS. Happy 4th Birthday, Small!