The 42-piece set includes varied sizes and shapes for countless roadway configurations in the classroom or playroom. Children will find the durable, hardwood veneered pieces are sized to their unit blocks, at a 5" standard width, and can be easily put together and taken apart like puzzle pieces. A set ideal for large group play, the Roadway System builds teamwork, cooperation, and sharing skills among children, while enhancing their creativity and problem-solving skills with each new design. Sizes range from 2.5" to 15" long. Ages 2+.