My five year old wants to learn to play Minecraft. I suggested that she sit down with the twelve year old and discuss her best approach. She looked confused for a bit, then came up with "I want to make things and EAT FOOD!". Yeah, that's my kid. When push comes to shove, the most important part of the game is the food. Don't bother her with the details like whether she has access to the cheats or is in peaceful mode or not. Her brother will take care of those boring details.