Guys, need ur help please?

i just was wondering how round ur 's are coz i am not very good at masturbating coz i never but anyways...the other night i found my old hair curler that i never use...it is 7.5cm round but i got nothing from that too...is it too thin to feel it properly? also i gave another curler and it has 2 heads to attach one of which is 11.5 cm round but i havent tried it yet coz im not sure it will work...i dont want to buy a vibrator coz i dont want my parents to find it so i use things that are less noticable but also i dont have doms to put over them so i use glad wrap...u guys got n e ideas to make it seem more real...thanks xo