Secret Agent Invisible Ink Spy Pens (Set of 2) - by REX

• 2 pens with invisible ink

• Ink is revealed using the light in the pen cap

• Remove the white caps from the pen nibs before using for the first time

• Each pen uses 3 LR41 Lithium batteries which can be replaced by unscrewing the top section of the pen

• Suitable for 3 + years