Neil Patrick Harris and David Burtka's 6-year-old twins, Gideon and Harper, are probably the kids to hang out with in school - not because of their famous dads, but because they're turning out to be quite the pranksters. The A Series of Unfortunate Events actor posted an adorable video of his family on Instagram to celebrate Easter Sunday, but things weren't as sweet and innocent as they first appeared. After Gideon and Harper wish everyone a happy Easter into the camera, the stuffed bunny that Neil is holding turns into a terrifying monster with fangs and angry eyes. Of course, this isn't the first time we've seen this family joking around for a holiday. On St. Patrick's Day, Neil shared photos of their home on Instagram after a naughty leprechaun destroyed everything. We already can't wait to see what kinds of pranks Gideon and Harper will play on their dads when they're teenagers.