I had one that was on a nerve and one that wasn't. One hurt and the other didn't. If it doesn't hurt, I wouldn't go cutting on it. That duct tape thing sounds like a good thing to try especially if it doesn't hurt, also the homeopathy is a good solution. I would combine the 2. Very inexpensive to do it this way. And since your son is so young, I would do the less invasive methods rather than mentally scar him by having that freeze put on.
Back when I was a kid the Doctor gave me a little bottle of acid and I used a toothpick to drip it on to the wart. That was the painful wart. They won't give you this anymore, and the 2nd one I had, which was uncomfortable but not anything like the first, took FOREVER for it to go away.
It is true that it's from a virus, so the Oil of Oregano on the wart itself and taken internally would be a great solution. I would ALWAYS take Oil of Oregano rather than an antibiotic as it is antibacterial, antifungal, antiviral. It will burn anything out of you that is not good. It's usually about $25 a bottle. Much less than those $300 bottle versions of antibiotics they had me on which never worked. I was very sick at one time and without healthcare insurance. The doctor had me broke with all this medicine that didn't work. Then I went to the health food store, learned how to do Quantum Touch and Reconnective Healing and I've not been back to the Doctor since. It's been 5 years that I've been healthy. The doctors don't tell you that a lot of people are chronically sick because of Milk and Gluten products. It's true.
Love, L.