Set of 25 Amazing Pens from Marvin's Magic that can transform and erase colours.
Create amazing patterns with this clever set with pens that can change colour, erase colours easily and even write invisible messages. Built with durable, shock-proof tips, draw in one colour and the magic activator pen will change to another colour. Create 3D letters and make magical pictures to proudly display or use the special pen to reveal your secret messages. Washable too - Magical Pens!