1: seek professional help, 也就是说,约一个心理医生,探讨他们对未成年人成长期各种问题的看法和帮助;
2: 不要责怪孩子偷窃,如果发现偷窃行为,要帮他找台阶,不要当众训斥(您做的很对)同时纠正他的做法。譬如museum一事,我就会说“不知道谁不小心拿错了museum的东西,honey(儿子),你看我们怎么办?这是museum的东西,不属于我们,是不是我们应该送回去?” 如果他说是,千万不要怕麻烦,路程再远也要掉头送回去。如果他说不知道,更要做个榜样,送回去。必须nice and firm.
3: 经常问问他想要什么?如果他一段时间表现好,陪他出去逛街并奖励他,让他自己付钱买东西(boost his confidence and esteem being honest and doing right). Be patient, praise more and often, never never punish him for stealing.
4: give him a lot of attention, care and love.
Just my two cents.