But Not the Hippopotamus by Sandra Boynton

[Little Simon] A hesitant hippo makes a big impact in this whimsical story about taking a chance from board book creator Sandra Boynton. Follow along as this shy hippo observes spirited animals cavort in a bog, try on new hats, and go for a jog, all while longing to join in the fun. Building toward an exciting ending, readers will be cheering on the hippopotamus as it finds the courage to say YES to trying something new. Then the animal pack Comes scurrying back, Saying, HEY! COME JOIN THE LOT OF US! And she just doesn’t know— Should she stay? Should she go? But YES the hippopotamus!