Science & Exploration Sets features: Kids play the dominoes train toy with family members and friends together, which will promote parent and children's relationshlp or friendshlp. This also helps to improve kids' communication, cooperation, creativity and fine motor skills. Great building blocks toys for kids. The toys can exercise the patience of children. Features Material: Plastic Size: About 33x8x3cm/ 12.97x3.14x1.18 inch Note: The train head is random color. This toy kit is not included battery Made of plastic material for durable and safe in use Accompany your child to play this toy to the parent-child relationshlp Simple but fun, it will give your children a happy childhood Equipped with large dominoes to prevent children from swallowing Help to train children's hand-eye co-ordination skills, develop creativity and imagination, develop foster logic thinking, expand knowledge, and more.