how to tell your SO your pregnant?

im not pregnant but we are trying too! time to time ill think how ill tell him i want to make it special of course! so when i do get pregnant i want to tell him about it though video game or cars since thats who he is huge gamer and love cars and works on them so right now the only thing i can think of is getting "baby on board" thats Zelda theme unfortunately im not that creative so whats why im asking for help hehe :D