Looking for a children’s picture book we read at our local library about 2-3 years ago about boy (maybe called max) who sells/gives poems out on the sidewalk (maybe at a stand?). Kids pass him on the street and ask for poems. One is about buttons and repeats the word multiple times, like, buttons on your buttons buttons, one is about seashells after a friend is headed to the beach, one is about kittens because someone is giving them away and the last one is a gift for his sister whose birthday it is the next day.