Baby shower idea for gender surprise

Cristine • First time Mom, with 4 step kids. Can't wait to meet my baby girl in March 💕💜💕
I'm waiting till birth to find out the sex of the baby. I usually like things to be in order and all but I thought waiting would be a great surprise. So I don't want a yellow and green baby shower or get a ton of baby duck clothes lol. Any ideas on decoration, themes, cake and colors?