anatomy scan

I go for my anatomy scan tomorrow at 18 weeks 3 days and hoping to find out the gender!! If we do, I want to reveal to my boyfriend in a cute and special way, I had brought both big & girl clothes and I was thinking put it in a bag of what onsie the baby is, or put into a clothing box, and wrap it up and let him know that way, but I want more suggestions on what should I do, just something small and simple!!