An elephant costume!!! Lol. When I was pregnant with our first child, my husband had started a new job and said he hadn't had time to get me a birthday gift. Thinking he was just saying that in order to surprise me, I said "That's Okay!" But when my birthday came and went without a gift, I blew up, following a long spell of silence. He was so mortified, he bought me a pearl necklace and has never overlooked a gift-giving occasion in the 42 years since.