This is the Designer"s Special Model Rocket Kit by Estes. Suitable for Ages 10 & Older with Adult Supervision for Those Under 12. Skill Level 1 Rocket Kit. FEATURES: Build and fly your own designs Parts included to build up to 8 rockets 100+ parts INCLUDES: 2 each - BT-5, BT-20, BT-50, BT-55 and BT-60 18" body tubes Assorted engine mount tubes Assorted laser cut centering rings Assorted green centering rings Tube couplers for all body tube sizes Parachutes and streamers Launch lugs Engine hooks Engine hook retainer rings Engine blocks 1/8" & 1/4" shock cords Shock cord mounts Wood sheets for making fins Fin templates Tube transations Plastic nose cones Nose cone inserts Clay for nose cone weight Clear payload section Model Rocket technical manual (basics of model rocketry) REQUIRES: Assembly COMMENTS: Due to small parts that could cause a choking hazard please keep away from children 3 years of age and younger For your safety and enjoyment, always follow the NAR Model Rocketry Safety Code while participating in any model rocketry activities tlc 5/31/12 updated tlc 10/25/12