Here are the steps on how to use Promo Codes when shopping at kennedyspacecenter.com: You need to log in to your existing account at kennedyspacecenter.com or create a new account of your own; then, to select a product, you can browse the kennedyspacecenter.com product page to select a product and add it to your cart. Occasionally, they will offer you discounted products up to 50%. Then place an order, click the Coupon Codes obtained on the settlement page, you will automatically jump to the existing Coupon Codes page, select the Coupons you want to use, and complete the payment.