This set introduces toddlers to the alphabet with blocks featuring all 26 letters from A to Z. The musical train plays realistic train sounds and melodies. It includes 50 easy-to-assemble pieces, such as large building blocks, rolling wheelbases, and a smokestack component. The blocks are compatible with other major stacking toy brands for expanded play options. Designed for children ages 1 and up, the oversized blocks support the development of fine motor skills, creativity, and imaginative play.