Help Me with Hair Products or anything like That?

Ok so my hair color is naturally brownish blackish, Looks black though. But Without making my parents notice i want to put some blonde in my hair, I mean jst a little blonde. I DNT MAKE TO DYE MY HAIR BLONDE, I jst want sumting that u can put in ur hair little be little to make it look more dirty blonde, and i dnt really want to go shopping for some fragments or hair coloring, but if i do go 4 hair colorong, how do i put it into my hair little by little to make it a gradual process of becoming dirty blonde, I DNT WANT PEOPLE TO NOTICE THE 1ST , 2ND OR 3RD TIME IM ACTUALLY USING IT, so if i put lil by lil jst to make it blend in wud it help. WELL w\e idk, plzz help mee, thanks=]