Fun Factory designs the Wood Knob Puzzle Train as an educational toy which helps children learn colours and shapes. It features a wooden puzzle board base with a train painted on it. The puzzle pieces have sturdy wooden knobs and a matching picture underneath for kids to identify which piece fits where easily. It uses bright colours like green, red, orange, purple, yellow and blue-the puzzle pieces are of different colours and different shapes like circle, triangle, square and rectangle. The puzzle can help children learn about colours and shapes as they try to put the puzzle pieces in their correct places. The knobs are easy to hold even for small hands, and the puzzle uses non-toxic paints.The entire puzzle is made of wood and measures 22cm high and 30cm long. It is recommended for children over 2 years old.