Non sleepers during the nap times..

[Rose1]

I have five nice kids in my day care and they all have a nap at the same time and can sleep longer if I let them,except for one little child who is only 14 months old and is a very light and short sleeper
Let say,child is very tired and after the lunch would fall asleep ok,but would wake up usually after some 30 min. And then cry/screem like something is attaking him..
All the rest of the children still sleep during that ordeal,if I come to get him he jumps like nothing happened and stops screaming right away.
I don’t know what to do with him,he is still a baby and needs to be constantly watched,he does not sit and likes to move all the time,explore around..I need my break and finish things I did not before they went to sleep.
Please,give me some ideas and your opinion in regard of this.
Thank you so much