You will have a blast. Wear comfortable boots and comfortable clothes you can layer off depending on the weather.
We have young folks do "follows" with our clinic all the time. Its a great learning experience and at our clinic, they get to do both large and small animals. Some of our "day follows" have actually been encouraged to come back and work part time during the summer. The high school in town also has a program where Seniors can work for different businesses during the school year for credit. We usually have between three and four a semester come to the clinic two to three days a week. We let them help with the minor things like learning to shave for surgeries, how to hold animals for treatments, help listen and take vital signs during surgeries, even attend euthanasia procedures.etc. Of course one of us is always there to prevent anything happening and the vet is always in attendence but its amazing how some of these high school girls and boys show really promise and truly decide to become a vet.
I hope this is a program that alot of high schools do all over the country.