Congratulating grandfather on his birthday is a great joy for a grandson or a granddaughter. So, yoy should try to give him happy emotions and pleasant wishes whenever it is possible. A great way to surprise him is to give greeting e-cards, for example, GIFs images that will make the birthday man happy. After all, he is waiting for the moment when he will be congratulated by his grandchildren who he simply adores. Therefore, greeting animated pictures will be a proper sign of attention.