Volunteering at a day-care center.
I have worked at a day-care center.
I went there once a month.
There were a lot of things to do.
I took care of young children. I played with them. I changed their diapers and clothes. I washed the kids, too. I like the work very much because I could help kids there.
(Would you check the writing above? Correct errors, please. Thank you.)