How to work: 99 designs are a website, here you can purchase or sell your design with contest your luck. That means if you are a good designer so you can participate competitively in 99 design.com,, here you have a great opportunity to win the competition and win lots of money if your design is world class content.
"Are you ready to solve the challenges of space?
Join the RealWorld-InWorld NASA Engineering Design Challenge!
This is a unique education initiative that targets students in grades 9-12 and encourages them to explore and build skills essential for successful careers in Science, Technology, Engineering, and Math (STEM) through two phases of project-based learning and team competition"