The Megistian Aenigma Agon (Megistian, due to the name Megisti) is a Quadruple International Competition (Inscription, Illusion, Invention and Interaction) that began in 2017. It’s a celebration of games and puns for children from 0 to 150 years old, which presents to the world the leading role of Greece in puzzles and riddles.
You can take part in the 5th MAA by sending verbal puzzles, images-puzzles, or three-dimensional puzzles, while there will also be a speed solving tournament. The best will win prizes. As of this year, the MAA (just like the 14th KEC Puzzle Exhibition which was launched in 2008) is part of the Puzzle Festival.