Knock It: Ball TrackAge: 18 months+ Product Size: 51X23X31. 5 cm Net Weight: 1170g Material: Solid Wood This classic Wooden Knocking Ball Track is designed to keep little hands and eyes engaged for long periods of focused play. With each tap of the hammer, your child watches the ball drop, roll, and reappear, creating excitement and teaching cause and effect in the simplest, most enjoyable way. 2 ways to play: In addition to the rolling balls, this set also includes 1