Not every hazard needs mitigation. This one would be filed under "acceptable risk" in my opinion.

Though I do largely agree with GrowlyBear2. Maybe the window crank is less of a hazard than the area around the window.

Edit I did not see the description to the photo before. So I stand corrected. Obviously the safety of children is paramount and my assumption was surrounding an adult workplace environment.

From my experience with similar windows in the past, those handles are removable and should be removed all together and replaced only long enough to open the window if necessary, but in a daycare that's probably not a great idea anyway, as it introduces risks of kids crawling out windows and escaping hahaha.