HI Renee, I just saw that you posted The Spoon Theory. I am so honored that you included it here! and yes, there are many of us "spoonies" out there that have used this example to explain lupus and other chronic illnesses as well. View Thread
Keeping those lines of communication open are very important. Be honest. Describe how you are feeling in words, expressions and examples they will understand. Of course keep things age appropriate for younger ones. Keep in mind while you are here on webmd learning about lupus and more. Your family needs education too.