Gender Reveal or not?

Thinking of buying this. We haven't had a scan yet, I would love to wait till we have a scan but I've got 3 weeks to go :/ my scan date is the 15th May. I'm going to be 10 weeks on Sunday. I think we shouldn't find out this time.

Picture of what I want to buy but to keep it secret, going to have ask the Mr of the house should we or wait.