Stacey, there are lots of ways to get extra calories. If your son can drink, do something like Reliv. My daughter loves both the Vanilla and Chocolate Kids NOW!, but she also asks for the adult shakes (NOW! and Innergize) that taste like Gatorade. I prefer these shakes over Scandishakes because Scandishakes and the like are mainly about calories, not nutrition. Reliv is mostly about nutrition. Those of us who need extra calories take them between meals as supplements in addition to our regular diet. Lots of people with CF have had great results with improved health because of the combination of nutrition and added calories. (<A href="http://www.geocities.com/MurrensNatureMama/Reliv">www.geocities.com/MurrensNatureMama/Reliv</A>) Also, we talked on another thread recently about getting calories from non-junk food. Lots of things are calorie-loaded. Avacadoes, whole wheat products, whole dairy products, flax oil and flax seeds, nuts, canned soups (high in sodium also, which tends to be good for most people with CF). Try making "ants on a log" - pieces of celery with the canal filled with peanut butter and raisins put on top of the peanut butter. Or apple slices with peaut butter (or almond or cashew butter). If your son has trouble eating a lot, how about juicing? You can throw apples, nuts, flax oil, grapes, spinach, honey, dates, etc. into a blender with a little water and ice and make a smoothie. LOTS of nutrition in just a small cup. Little boys like the green color the spinach makes because it is like army colors or bug guts or snot. Whatever appeals to your son. The younger he is when you start experimenting, the more things he will be open to trying. Give him a little plot in the back-yard and let him grow veggies or plant a few little lemon trees. Most kids are excited to eat things they have grown themselves. Or let him help in the preparation or foods. Anything they can help make or do is more appealing - especially at his age when helping equals playing.