one love 420

i v been smokin for about 6 months now and i really want to get a good bong. i've been smoking out of a peace pipe i bought from a native american guy at a yard sale. it works good but i think its time i need a bong. Im only 15 but i can ride my bike to an awesome head shop in like 10 minutes.i tried to buy one there and i asked for an incense burner and the next week i asked for a water pipe.
Both times the guy behind the counter recited the same speech about not sellin tobacco smokin products to minors. should try to bribe him or ask someone in the store to buy one for me.
I dont wanna hang out outside of the store and ask people because the chance of someone who knows my parents will see me and ill have to take a drug test every week till i turn 18.
should i try to buy one over the internet or is that even riskier.
pz,
Mike