I've read and enjoyed many posts here about portraits done with Lincoln cents, floors covered with them, toilet seats containing old U.S. Mint Sets, etc. (And some really cool custom projects done here by members but I can't find the threads at the moment). Please try to keep non-photo-containing comments to a minimum and only post pictures of coin art from any country. Thanks.
I think is what you are looking for on CoinTalk: https://www.cointalk.com/threads/penny-project.269032/