Gender revel to husband

Lela
 Trying to figure out a creative way to tell my husband the gender of baby #3. He at first said he wanted to wait until it is born and find out at the hospital but now he said he wants me to surprise him on Christmas Day (I find out in the 23rd). I was thinking of trying to find a gender neutral onesie so the color doesn't give it away that said either "daddies girl/princess" or "daddies boy/slugger" and have him open it as a gift or have him a card that has the ultrasound picture in it with a pink or blue background. My other boys are going with me to find out so maybe something involving them as well. Anyone have any other ideas?