We had to collect on our last trip plenty of mosquito bites and could experience with this new acquisition. In fact, it is briefly quite painfully hot and we were thinking about whether we want to do to us the. We quickly realized that the itching to stop playing and we forgot the stitches immediately, the brief pain was worth! We used the pen (thanks to many mosquitoes at the lake) very often and have become avid fans! But some effort it costs to push still on the button :) probably not suitable for young children.