ZUNTENG Invisible Ink Pen,7Pcs Spy Pen,Invisible Disappearing Ink Pen with uv Light Fun Activity Entertainment for Secret Message and Kids Goodies Bags Toy

Invisible ink After writing, the ink will be invisible, unless you turn on the light on the cap to see the secret information perfectly. Safety your childs healthy toy! Suitable for T-shirts, paper, skin and any smooth, faded ink surface, permanent but washable! The perfect gift suitable for childrens birthday gifts, holiday gifts, children will be very happy Warm reminder children under 3 years old do not use, the product contains small parts! ! ! Accessories our pen comes with a battery, no need to purchase additional batteries, the insulating sheet between the batteries can ensure that the electric pen you receive is fully charged