I often lecture my clients and culinary students about how easy, cheap and fun it is to make things yourself rather than depend on someone else to do it.  And if you have kids, making something like peanut butter is a fantastic way to start teaching them to be confident in the kitchen and the joy they get out of making something from scratch is so much fun to watch.  Peanut Butter that you find at the store is often full of nasty oils, sugars and salts.  Specialty peanut butters are incredibly expensive and again can be full of added ingredients that make what could be a healthy snack or treat- very unhealthy.  You can make plain peanut butter in minutes and have a blast making your own gourmet peanut butters for the fraction of the price.