Really nice high quality socks to protect feet of a diabetic, look for no seams even in toes area to chafe feet of diabetic
nice creams for rubbing on feet with verse about caring for feet.
mirror for inspecting parts of feet that are harder to see as we get older and less flexible
nice box of Whitmans Sampler sugar
Sugar free things: breath mints, herbal tea, sugar free cookbook or recipe cards
Subscription to a good magazine like Diabetic Self Care
Exercise is usually recommended, along with weight loss where necessary, so perhaps a pair of jogging shoes, a pedometer, or a gift certificate for a consult with a sports coach or nutritionist to encourage new habits