If your son is not sick he should be learning how to put himself to sleep. A good bedtime routine can be a life saver.
I learned this caring for kids who had no bedtime routine or horrid routines. Imagine 3 kids under two who will not go to sleep without at least 30 minutes of undivided attention. Or a child who CANNOT go to sleep without that one special blanket or toy. Heaven forbid if you forgot it. Or the two year old who will only go to sleep if you lay next to them and let them stroke your hair. Or the two year old who only went to sleep while stroking his older brothers ear. I have some horror stories.
When my son was little we would dance (or sometimes rock) to some active music then to slower music. I would cradle him in my arms and dance. He loved it. I would then put him down with some snuggles and pats and I would promise to be back in 5 minutes to check on him. He was usually asleep by the second time I checked.
When he was a little older I would put him in the wagon and take a short walk before storytime, snuggles and bed time. I would still go back and check every 5 minute or so.
He became a great sleeper. He would nap anywhere if he had a place to lay down.
At two years of age, I would bring his nap pad to the river where his cousins were swimming and playing. I put the pad in the shade,snuggled him, covered him with a light blanket and he would go to sleep.
When we went camping, I would set the tent up so he could see me by the fire with my siblings, give him a small flashlight to play with ane he would drift off to sleep. After about 15 minutes or so I would go turn off the flashlight. (I always put him to bed before it got dark.)
Good sleeping habits can and should be learned early.