Estes 1756 Alpha Rocket Bulk Pack, Includes 12 Model Rocket Kits (Intermediate Skill Level)12 Pack intermediate skill level Alpha model rocket kits: each kit is individually wrapped with materials and step by step instructions required to assemble the rocket perfect for schools, clubs, and rocket demonstrations. The Alpha Bulk Pack has been the top choice of educators for the last 40 years and is still going strong. Its popularity stems from its ease of assembly, customizable features, and the ability to teach a wide range of STEM concepts.