I used to go to the playground with my friends. It was in front of my kindergarten. Therefore, I usually went to there after finishing school. There was a slide, two swings, a sand box and monkey bars there. I usually built sand castles and played on the slide.

I used to go to the playground with my friends. There was a playground in front of the nursing school. (I think the word you are looking for might be "preschool" or "nursery school") Therefore, I usually went there after finishing nursing school. There was a slide, two swings, a sandbox, and monkey bars at this playground. I usually built a sand castle and slid down the slide. (You can also say "went down the slide")

I used to go to the playground with my friends. There was in front of the nursing school. Therefore, I usually went to there after finishing nursing school. There was a slide, two swings, a sand box,a monkey bars inside of there. I usually built a sand castle, slide the slider.