In any case I made this card for them. I used white satin finish cardstock and teal cover stock I purchased at Paper Plus in Phoenix. It is actually more commonly used for report covers since the white is 84 lb. and the teal is 105 lb. But I love it for cards. The white was perfect for the Cuddlebug embossing folder (I love my 'bug --- it's a new toy for me).
Since they will also be celebrating their 80th and 82nd birthdays I will make cards for those, also. After spending the past few days printing photos it's good to get back to making cards again.