You can't prevent children learning. In a place where reading for pleasure is normal, children will learn to read more easily than in a place where reading is not the norm. If your house has no reading atmosphere they will learn whatever 'entertainment ' skills you demonstrate...
Read in the view of your kids: when there's something that would interest them reading it to them and show them the words. Buy them comics (have one delivered every week so the child looks forward to it). Ask grndparents and such to write regular short letters to the child Reading isn't a lesson to be taught outside the framework of everyday life.