Slot a sequencing card into the train track card holder and identify the missing carriage. There are 18 double-sided cards across 3 levels. Create a train and line it up on the train track in front of the card. Children can also start to practise numbers and measurement by making a train of a particular length. This set includes 4 x 33cm plastic train tracks with card holders. There are also 24 x 6cm engines and 72 carriages (1cm, 2cm and 4cm long) in 6 colours í? red, green, yellow, blue, orange and purple. Suitable for age 3 .