The common thread behind every reveal idea
Reveal ideas differ in the props but agree on one thing: they only come together once you know how many people will be in the room. A cake sized for twenty costs a fortune for thirty, a confetti cannon for a dozen underwhelming for a fifty, and the timing of the moment shifts depending on whether the whole crowd is present or half stuck in traffic.
One honest note before the ideas: there is no dedicated gender-reveal product to pick from. A reveal runs on the baby-shower setup, the closest supported type, which already has the page, the replies, and the guest list you need. Whatever you decide to do for the reveal itself, the headcount underneath it is gathered the same way a shower count is.