The people behind Morphsuits bring you this Alien Kids Piggyback. Just stuff the legs, climb in and you're good to go. Piggyback Costumes are even more fun in a group, so make sure your friends get one too. Great For Parties Alien Kids Piggyback costumes are the perfect for parties, charity events, school spirit, sport events or just running around the house. We would be surprised if you didn't make an impact in your Alien Piggyback The Size For You Piggyback costumes come in one size and so no need to worry about getting the perfect fit. They require a little bit up stuffing, which is not included. You can use paper, towels or any other filling garment.