Position-Kids in year round athletics

An idea I had for my position paper is whether or not kids should be in year round athletics, like just playing one sport all year long. Or is it better for kids to play multiple sports and keeping them from tiring themselves playing only one sport. My position on this topic would be kids playing multiple sports. Some reasoning I have for this is children that play one sport get burnt out and sick of it after a few years, and reoccurring injury because the same muscles keep getting used and stressed.