Estes Rocket Models Viking (Pk12) - Skill Level 1The Estes Viking is one fantastic research rocket with 48 possible different fin configurations! Five special die cut card stock fins allow you to create a rocket that's truly unique! Take your pick on how you want your rocket to look: fins up, fins down, or whatever way you want! You call it, it's your day to be the rocket designer! Customise your own rocket no matter how you place the fins, it still offers the ultimate in high performance model