What's that on my head? is a deduction game where players can see everyone else's cards save for their own. Each turn players read off a question and answer it according to what they see on everyone's cards. Eventually this gives players enough information to deduce what is on their own cards and winning a point. The cards that the players have to guess show different numbers. Variations of the game uses letters (What's That on My Head? & Egghead) and numbers combined with colours (Code 777). This results in a different question set. Similar to: Code 777 What's That on My Head? Egghead Amnesia Guess What I Am! Coyote Pow Wow Am I a Banana?