These kids jump morning, afternoon and evening; when they ought to be in bed and when they’re supposed to be doing math and piano; always when friends come over, sometimes alone, preferably together, and definitely with Dad.  On the trampoline they laugh, smile (I really don’t think it’s possible to jump without smiling), and enjoy each other.  When they’re grouchy, jumping brings them back to joy.  Every time they can, even sometimes in the rain, they jump.  It’s fantastic.