a walk in the parksomething that is very easy to do, and usually pleasant:He’s used to hard physical work – this is a walk in the park to him. (Cambridge Advanced Learners Dictionary and Thesaurus)
Momma and I took a walk in the park at the end of my block today. Actually, I did the walking as I pushed her in a wheelchair through the park, around a little pond, past a Splash Pad play area, and home again. I tried to make it interesting as I pointed out various trees, flowers and critters along the way. Though she enjoyed it (especially seeing the children joyfully playing at the Splash Pad), the walk was peppered with worry and fretful questions.