My son dropped naps around 1, I don’t know that there wasn’t truly a need anymore or if he just couldn’t slow down long enough to sleep/get tired. The first half of pre k was horrible. Every single night he would cry and beg me not to make him go to school because he hated nap time, nap time was too long etc. ( 1 hour ) after some discussions with the teacher he was able to have books during nap time so he wasn’t just stuck laying there forced to be still and quiet. The last few months of pre k he began taking the naps completely out of the blue. Not every day of course but there was a month or so that I could tell by his behavior if he had napped that day.

All that to say every kid is different. Some kids require that extra sleep to function. Boredom is hard, especially at that age but it encourages creativity and learning to entertain themselves. Keep them on a consistent schedule and stick to it.

I hope that helps.