Rewarding kids with things they get to do instead of things they get to have. When they do something good, they pick from the jar and get things like to stay up a little later or play outside a little longer etc. Cute idea!
To package snacks for traveling kids, use a tackle box or craft organizer box and fill each compartment with something different (fruit snacks, dried fruit, nuts, candies, crackers, roasted chickpeas, popcorn, baby carrots, etc.).