I enjoyed working with kids. I was given a lot of leeway in terms of what activities I could do with my groups, which allowed for a less rigid schedule that was more in tune with how kids like to learn and play.
What I wish was different
Honestly, I don't have any complaints that have to do with the structure or constraints of the job.
Advice
Listening closely to kids, like you would an adult, is a must for working with them positively.