One of the simplest ways to reveal the gender of your baby via social media is with a flat lay design. Lay a few gendered items like a pink or blue onesie, hairbow, or baby booties in a cute display with other items like a letterboard sign or ultrasound photo. Then snap a pic and post. For a party, you can reveal the baby's gender using treats like colored frosting-filled cookies and doughnuts or a gender reveal cake.