This is a case of 540 helicopter kits. Kits are packaged into boxes with 10 sets of materials per box (54 boxes per case)
Every case comes with 540 plastic propellers (5.75" long), 540 rubber band hooks, 540 pieces of card stock, 648 craft sticks, 756 rubber bands, and 2,268 adhesive squares 
The rubber band helicopters offers kids and students a fun opportunity to learn about science and engineering concepts like lift, drag, propulsion, potential & kinetic energy, and more! 
There's no single correct answer! Experiment with different shapes and sizes of paper cutouts to discover a design that works great. Or use the supplied template to create a helicopter-shaped flyer that'll be sure to work 
Comes with brightly illustrated step-by-step instructions, complete with an explanation for how it works, troubleshooting support, tips for teachers, and more! 
This kit was created by professional hands-on educators. Designed for classrooms, after school enrichment, summer camps, libraries, and hero parents who value DIY STEM education!