Many Thai children spent their summer holidays either at summer school or, if they were a boy, ordained as novice monks at their local temple. The novices spent a lot of the four week period studying Dhamma, meditating and also having valuable lessons in ethics. As novices, they had only 10 precepts to keep unlike the 227 that the monks have to obey.
The novices weren’t allowed to kill, steal, lie or even sing. They also weren’t allowed to have sex or become intoxicated which hopefully wasn’t too hard for them. These ten precepts are the same that lay people try to keep on important Buddhist holidays and during the Rains Retreat. In addition to the precepts, the novices had to learn the 75 training rules which dictated how they should behave in the temple and when they go out on alms round.
(source: Buddhism in Thailand)