Henry's cousin Annie wants a pet, but she can't have a big dog like Mudge, so Henry and his parents help Annie settle on a pet that is perfect for her and her more delicate tastes - a little white bunny!
After noticing that a visiting hummingbird likes her pink petunias, Annie and her rabbit Snowball, accompanied by Henry and his dog Mudge, fill the garden with pink objects to attract more hummingbirds.