For vaginal stimulation the best are geisha balls. These balls will strengthen the pelvic floor and vaginal muscles. This will cause you to have much more powerful orgasms. Try them in the shower.

Features:

• Smooth
• Silicone + ABS
• Weight: 0.078 kg
• Waterproof
• Fthalates free
• Measurements: 17.7 cm x 3 cm x 3.6 cm