This topic came to me as I was looking at the age regression in the sick role thread. These days, most kids' temperatures are taken with ear thermometers. However, children back in the day didn't have that option, and some people stick to an adult route even in their Little headspace. So, which route is used for you?
For me, temperature-taking is still a "bottoms up" procedure - usually using a Geratherm at home, or a digital probe at the doctor's office.