Bring one of the most recognizable toys of all time to life with the officially licensed Fisher-Price Rock-A-Stack Inflatable Costume for adults. Featuring an inflatable costume, coordinating headpiece, and battery-operated fan to maintain its oversized shape (4 AA batteries required, not included), this costume transforms a beloved childhood classic into a memorable party look. Great for Halloween, retro-themed events, group costumes, and family costume fun, it's a playful way to celebrate a toy that has entertained generations of children. One size fits most.