Agree with everyone saying creative mode here. Sandbox experience: No death, non-aggressive monsters, flying, unlimited blocks to work with, and console & mobile versions have all the recipes exposed, so you don't have to memorize anything, just gather the resources to make stuff.
My son at 3 learned 3d navigation via Minecraft on iPad, and then 360 controller with Minecraft on that. He couldn't read words yet, and that didn't get in his way. If your kid is like mine, they'll have the icons memorized and doing everything in a week or so, even if they can't read yet. It may be frustrating or a lot of "what's this do?" until it clicks. =)
My son at 3 learned 3d navigation via Minecraft on iPad, and then 360 controller with Minecraft on that. He couldn't read words yet, and that didn't get in his way. If your kid is like mine, they'll have the icons memorized and doing everything in a week or so, even if they can't read yet. It may be frustrating or a lot of "what's this do?" until it clicks. =)