Upload ideas!

Mini Challenges!

New inventive challenges posted each week


Secret Message

Invent a way to send a secret message
Random challenge

Top secret!

There are many ways to send secret messages! Whether you choose to communicate in code or use the element of surprise, think up a way to get your message across in a top secret way...

Want to find something specific?
See all challenges
Subscribe to our Mini Challenges emails
Send your own challenge for us to consider and publish
Submit your own Challenge