[cyberferret]

Very cool - I recognised the Pigpen cipher immediately, as we used to use it all the time in my boy scout days back in the 70's. The process of figuring out the substitutions was very cool, and I might use this article as the basis for teaching my kids about cryptoanalysis...

[aaronrandall]

The Pigpen symbols certainly are distinctive, recognising them helped me get started.

That's great to hear, hope your kids enjoy. Thanks!