On the 19th month of life, babies need to sleep, at least 13 hours a day. The majority of children still do not mind sleeping in the morning and / or dinner. Although it becomes more difficult to sleep during the day put some children in the second year of life, some refuse to nap at all. The kid that age could do one, afternoon naps, especially if he sleeps for a long time (an hour or two).
But it is rare that a normal, active child can awake from dawn to dusk without a rest, or at least some time to rest. If your baby is on strike against the afternoon nap (why would he need a rest, if he can go out and play?), Continue to create a quiet, peaceful environment, how would you do if they put him to bed. Darken his room, read him a book, turn on soft music, in general, create an atmosphere conducive to sleep. Anyway, at least he may rest from the noisy games that he so needed. And you, too!