Mercer Mayer's Little critter

"Litter Critter loves being first--even if it hurts his family and friends. After several missteps, Little Critter learns that the secret to getting along is treating others the way he wants to be treated--which, in Little Critter's case, means letting someone else be first"--

Little Critter and his mother take a trip to the city, where they visit museums, explore stores, and eat lunch.

Bun Bun is disappointed when everyone appears to have forgotten her birthday.

Gator can't go swimming until he cleans his house, so all his friends help.