回复：在美国节俭也是美德。但不能贪小便宜！

从我观察，节俭孩子们能接受。当然不要过度。
贪小便宜令孩子们尴尬。不过我认为多拿饼干不是贪小便宜。 骑码我从来没这么想过。 My kids always ask more cracks with soup because they like to eat more, and the waitrees always very happily to get more for them. I think the price for the soup also covered crackes. They are not free.

There are something. I do not know if American doing that or not, but I see some chinese doing it. Cheating about kid's age, borrow other people's membership cards to save money. Some chinese doctor would cover your copay by cheating insurance company, and they only do that for Chinese people because they think we would accept it happily.