Exercise hand and brain combination: This is a creative track ball building block combination toy,can exercise the children's hand and brain combination,space to move imagination.Identify the multiple colors: Baby can identify the multiple colors of the building blocks during the construction process,and master the structural space feeling of the building blocks.Flexible and Interesting: The toy is designed with colorful stereo labyrinth tracks that can be combined arbitrarily. Using a card type combination, through brain thinking,you can assemble into a smooth labyrinth track,and you can create a combination of different maze routes.Age Range: Over 3 years oldMaterial: ABSSize: 16.5 x 16.5 x 5 cmWeight: 400gPacking List:168 x Building Block1 x Color Box