EASY TO ASSEMBLE & PLAY - Track Circumference: 216cm.Children can assemble the upgraded modular rail track parts into their own railroad layout firmly and easily (circular and oval layout), and the train moves on the track smoothly.Cultivate the relationship between children and parents to improve parent-child interaction.IMPROVE CHILDREN'S HAND-EYE COORDINATION - These toys can reduce stress,Promote sensory perception development,which advances cognitive abilities. Contrasting colors in bright patterns encourage vision development and inspires imagination.A perfect way to relieve stress.It's a fun way to keep the brain focused and the hands busy.GIFT & NICE CHRISTMAS MEMORY - Let the train around your Christmas tree, it will be the most eye-catching Christmas decoration in your house. Suitable for: Christmas Decoration, Home Decoration, Children's Gifts, Christmas Tree Decoration. It is the best gift filled with Christmas atmosphere for your kids or your friends on Christmas party, bring they a vibrant Christmas atmosphere on Christmas Eve.have a very nice Christmas memory.SAFE NON-TOXIC ABS MATERIAL - Made of durable eco-friendly ABS plastic material with highest quality. No toxicity, No stimulation and Oxidation resistance. This electric train sets is the best gift filled with Christmas atmosphere for your kids or your friends on Christmas.1x AA Battery (Not Included).