Gender reveal party favors

I have no idea what to put in our favors!
I won't know the gender until that day only my mom and my SO's mom know.
We are going to do a picture of the ultrasound with a bow or bow tie, some pink and/or blue mnm's, I was thinking some nail polish if it's a girl?? I don't know! Haha I need some ideas for both genders!
Help please:)