Pros
It's a good feeling that's hard to explain when I connect with these kids, so if you're really into a rewarding job, this is it. My senior is super great, she compliments and encourages me to work on things I could do even better. You can gain experience in related fields that you're interested for your future goals (education, social work, etc.) Very relaxed, laid back job. Although you have to keep the kids engaged, it really comes naturally after awhile.
Cons
My senior seems very overloaded, even with her lead line to help her. So as a result, sometimes the schedules become messed up or they accidentally forget something you asked of them. But we're all only human. The pay isn't the greatest, and neither is the compensation for drive time. But I also work another full time job, so this works for me. The parents can kinda have their own annoying quirks (chatting your ear off during session; leaving you alone to basically babysit; hover over you too much, etc.)