Rocket - Estes Viking Model Rocket Bulk Pack (12 pk)The Very Versatile Viking is everyone's favorite research rocket to use with classroom investigations. This rocket has 48 possible fin configurations that can be used for it. Students can hypothesize how their fin arrangement will affect the rockets flight then put it to the test by launching it. The Viking is the perfect, low cost rocket for slim budgets. The Viking can be built with three, four or five fins in 48 possible arrangements. This makes it