We got the chance to play around with Marvin's Amazing Magic Pens, which change color when you use the magic pen against them!
Marvin's Magic 30 Amazing Magic Changing Pens
Marvin's Magic - NEW x 30 Amazing Magic Pens - Color
Marvin's Magic 30 Amazing Magic Changing Pens
Marvin's Magic - NEW x 30 Amazing Magic Pens
Marvin's Magic 30 Amazing Magic Changing Pens
Marvin's Magic Rainbow Colouring Fun – Marvin's Magic Worldwide
Marvin's 25 Amazing Magic Changing Pens
Marvin's Magic 30 Amazing Magic Changing Pens
Marvin's Magic Amazing Magic Changing Pens : Target
Marvin's Magic - Original x 25 Amazing Magic Pens
Marvin's Amazing Magic Pens (25 Pack) – Marvin's Magic Worldwide
Marvin's Magic - Original x 25 Amazing Magic Pens
Marvin's Amazing Magic Pens (2 x 25 Pack) – Marvin's Magic Worldwide
Marvin's Amazing Magic Pens (2 x 25 Pack) – Marvin's Magic Worldwide