Just want to share :)

HK • Married to my best friend. Alexis is 7, Oliver is 2 and Mackenzie was born 6/1/16
21 weeks today! I go in for my anatomy scan in a few hours. I've decided not to find out the gender. We have 1 of each already and this will be our last baby. But my husband wants to know. 
We've gone over a few different scenarios about how he'll find out. Do we have the tech mouth the gender to him while I look away? Have her write it down and let him look once we've left and when he's alone? His facial expressions will give it away so I can't be near him when he finds out. Any thoughts or suggestions? This is the first time one of us won't be finding out so its a new thing. Lol. TIA :)