Curved and straight tracks of all sizes, styles and crossings? It?s all here with this expansion pack! Adding this expansion pack to your collection will allow children to become detailed in their design and allow for speculation around how far to take the track before the pieces run out. Includes: 4 x Big Curve Rails, 4 x Small Curve Rails, 4 x 20cm Straight Rails, 4 x 15cm Straight Rails, 4 x 5cm Straight Rails, 4 x 10cm Straight Rails. Made of wood.