Snack break idea:
A script (or module) than converts a normal string to an encoded string using Huffman compression method, and compares it to the ASCII method or Unicode method of the string. It then prints out or shows the comparison (Spaces and other special characters should be counted, and capital letters should be counted separate from lower case).
Could be extended by:
Showing a visual representation of the Huffman Tree.
Creating a script that decodes the compressed string.

Click Here for a PowerPoint on Huffman coding.