Kalina is here to try out tickling for the first time today, and she told me that her feet aren't ticklish. I thought she probably just didn't know how it's done over here, so I put her through the regular routine, and I had her laughing a lot more than she expected. The massagers were the key technique, as the aggressive tickling is what gets Kalina to laugh. Kalina is 18 years old and has size 4.5 feet.