Gag gifts are such the norm for me that I can't think of any that stand out in particular.
The latest one was a niece's 29th birthday. She was having a bad time of it as it was the last one until the dreaded 30th. I gave her a card wishing her a happy thirtieth birthday and when she glared at me before launching in to a tirade I blamed her husband for steering me wrong. He is like me and was believable enough that she didn't know who to yell at.
It wasn't a gag gift but when my wife turned 50 I never said a word about it being her birthday. She headed off to work and fumed all day or so I heard. She called a couple times but I still acted as if it was just another day. While she was gone I hooked up a Happy Birthday sign that dropped down as the garage door opened, had an ice cream cake in the fridge, and had made reservations at her favorite local restaurant. Not really a gag gift but gagged her in the lead up.
