Promising Review: "The first time my daughter got her vaccines, she cried so much that I started crying. When she got home, she was really fussy and cried for hours. I was devastated — but suddenly I remembered that I had seen this product on Shark Tank! I bought it and hoped for the best. Well, today my baby had her second round of vaccines and she cried a little but for maybe two minutes!!! She even left the clinic smiling and laughing. Just place it for 15 seconds at the site of injection, then move it upwards and leave it on while they are putting the shot. That's it! The nurses were so impressed with it that they were going to see if they could buy some for the hospital. It is important to note that while they will not feel the pain of the needle, they may feel the pain of the liquid going into the muscle. I will give this as a gift for all future baby showers." —Zhure

Get it from Amazon for $39.99.