Rex London
Rex London Invisible Ink Spy Pens
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Crack codes and send secret messages with this awesome pair of invisible ink pens! Budding secret agents can write hidden notes and reveal them using the built-in UV light — perfect for top-secret missions and spy games.
Why We Love It
A fun and imaginative gift that brings out every child’s inner detective! Easy to use and endlessly entertaining, these pens make mystery-solving feel truly magical — write, shine, and uncover your hidden words in an instant.
Product Details
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Includes 2 invisible ink pens with built-in UV light
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Simply write your secret message and reveal it with the lamp in the pen lid
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Each pen uses 3 × LR41 lithium batteries (replaceable by unscrewing the pen lid)
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Remove the white caps from nibs before first use
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Material: Card, Plastic, Electrical, Ink
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Dimensions: 14.5 × 1.4 × 1.8 cm
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Warning: Button batteries can cause serious harm if swallowed. Ensure battery cover is secured and keep batteries away from children.
