Condoms for underage

Can you buy condoms like at a walmart if you are underage. I am 15 and live in Iowa. I am a virgin and don't need it for sex. I am planning on using it for masturbation. And since i am already asking advice what would be a good fruit or vegetable to use for a virgin that is not too thick. I AM OBVIOUSLY GOING TO BE USING A CONDOM IF I CAN!

P.S. What CHEAP brand of condom would be ok for use with a vegetable

P.P.S I can't buy sex toys I am 15 and I have no older person to buy from me. My parents are religious and I can't ask them or get caught.