That's an easy one. There are many vibrators designed for G-spot stimulation. I have several in my line of sexual aids and devices called Berman Basics. You can check them out anywhere from Amazon to any erotica site. You will be looking for something that is curved so that it can reach that spot in the inner third of the vagina on the belly button side. The "Adonis" is one of the more popular G-spot stimulators in my line.