How are you guys telling grandparents?

My husband is in the army and we rarely get to see our families. We are still close to them and talk a lot, but don't want to call them to tell them. Our baby is the first grandkid on both sides! We're going home to Christmas and I'll be about 8 weeks, so it's a little early, but we would rather have them there for support. Any ideas? We want to do something cute!