This is difficult for some children
, and their parents! try only letting him use it for sleep
at first, not when he is awake, and if he fusses, try distraction, like substituting something he likes.
At this time of year, it is great to get outside and try activity, like bubbles, where he would have to blow, or singing, sidewalk chalk or swings/balls etc. If he gets tired enough, he will sleep, .