Silly games like spotting the number of red cars while out on a shopping trip or playing about with words by making up silly rhymes all contribute to your childs education. The point is that you can still carry on with this type of learning activity and it will be a lot easier to incorporate printable worksheets into the fun and get your child working on them. Children love to draw and color and cut and paste so you can use this pleasure in a number of ways to make working on printable worksheets more enjoyable.
There are also teachers who use these kinds of techniques to teach in a more animated manner. The idea is to keep children interested because without their attention, it is difficult to make them absorb what you are trying to teach.