One of my all time favourite children's illustrators had to be the late, great, Dick Bruna. I have a giant poster of Miffy above my own bed in fact.
I have also just found the most gorgeous 1970s wall frieze featuring many of his fantastic images. Still in it's packet and in amazing condition, it would be great for a kids room or playroom perhaps, or just to keep as a fan like myself.
I've had various great Dick Bruna pieces in stock over the years, here are just a few of them. Many don't leave my home though i'm afraid.