Amazon's rules state that you must be at least 13 years of age to sign up for an account. However, you must be 18 to make a purchase (since you'll need to input this data into your account before a purchase), unless you can obtain enough money in gift card funds to pay for the purchase or receive a gift card-debit card that has a major card company attached that you can input to pay for the entire purchase price.
Aside from creating the logo, A.J Khubani actually played a huge role in the advent of the infomercial as we know it today, which started with his Amber Vision sunglasses in 1987. More recently, his company sold the PedEgg, another As Seen On TV product which has sold 50 million units (in addition to other successful products like the As Seen On TV mop and the As Seen On TV hose). Anyone looking for the same level of success with their own product can pitch their idea to both Telebrands and As Seen On TV, Inc. although they only accept a few submissions each year.