The first thing I ever try to convince my customers to try is the Bullet. It is a small 2 inch long vibrator attatched to a wire with a remote control. Try starting with something along those lines and place it near her clit WHILE the two of you are making love and grind against her putting pressure on it against her button...or even try inserting it into her vagina and it makes her a live vibrating pussy for you.....that may be a way to convince her of trying it and telling her that it is YOU who wants to see what its like.

If that doesn't work, try a cock ring with a bullet imbedded in it...this way you get the added benifit of keeping you erect longer for her. Point the bullet up toward your belly button so that it rubs against her clit. Or use one with a place for two bullets or a Double Bullet for stimulation on her clit as well as your balls...if you think you can stand it!

Those are my ideas...great starter toys and a perfect way to introduce a toy to the bedroom. Hope I was of SOME assistance!