Do you need more decoders? This two pack of Secret Decoders works with any of the Super Duper Secret Decoder Fun Decks. Use these Decoders with our Secret Decoder Fun Decks to highlight answers hidden with invisible ink! 5 5/8" x 1 3/8".
Remember, to activate your Secret Decoder you must remove the isolator strip between the batteries. Click here
for step by step instructions.