Spy Labs: Secret Message Tools - Thames & Kosmos Eric Carle lettuce and cheese

lettuce and cheese

Listen carefully—it really works

Requires 3 AAA batteries

Fun illustrations and cute superhero story offer a positive approach for parents and caregivers

Recommended for ages 12 months and up

Spy Labs: Secret Message Tools - Thames & Kosmos Eric Carle lettuce and cheeseAs a detective, you need the right equipment for your investigations, including tools for writing and uncovering secret messages. Exchange confidential messages with your fellow agent using disappearing and reappearing ink that only the two of you can read! Using either of the two secret pens, you can write a message that, once dry, becomes invisible. The other pen will not only reveal the information, but you can also use it to send your reply. 8+