The felt tip pen for colouring, building and playing; Connector felt tip pen bus; Content: 33 Connector felt tip pens in different colours,  10 connector clips; Due to special connecting caps, felt tip pens are easy to clip together; Brilliant colours; Twistable connecting clips enable imaginative building and playing; Washes out of most fabrics;  Pens encourage children to develop great drawing techniques for unlimited creativity; High-quality box - ideal for storage and for on the move.