Number Substitution Codes

Introduce the idea of substituting numbers for letters with this first set of number substition codes, where A becomes either 1 or 26! We've provided a chart printable to help and some fun coded mesages for the kids to decipher...

Code Buster 1

Code Buster 1

This code buster printable is useful for solving some of our Secret Code Challenges - and it is also great for kids who want to send their own coded messages! Just print out two copies - one for the sender and one for the receiver - choose which code to use, and start writing...

Secret Code Challenge 1

Secret Code Challenge 1

There are three coded riddles on this fun printable challenge, each written using a simple alphbet and number swap code. Some children may be able to crack the code on their own.

Secret Code Challenge 2

Secret Code Challenge 2

There are three fun riddles that the kids can enjoy on this printable - but only if they first crack the code so that they can read them! It's a simple code - swapping each letter of the alphabet for a corresponding number - and older children may be able to work it out by themselves.

Secret Code Challenge 3

Secret Code Challenge 3

Once they know that the coded riddles on this page contain a simple alphbet and number swap code, older children should be able to work out what the riddles are by themselves.

More Codes for Kids

Caesar Ciphers
Caesar Ciphers

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