The Music Tree by Julia Valtanen

Luke the frog is too busy to play the trumpet his grandfather sent him, and when Granddad sends him a seed, Luke is frustrated that it is slow to grow-until it responds to the music of a band of street musicians. Luke and the musicians play until the magical tree is tall and strong, and until Luke loves playing his trumpet. This is a story about patience and effort with delightful retro/folk art style illustrations.
Binding: Paperback / softback