I can think of several cross stitch patterns that could be enlarged and used for a pillow design. Cartoon characters with simple line art like those pictured would probably be best. Winne the Pooh, Hello Kitty, etc.
the bird & flowers make me think of my granddaughter . If it was warm outside she would head to the backyard to make a nest (on the table by the pond) using flowers & grass . She has such a sweet and tender heart.