Children aged 3-6 can give it two or three times a week, and each time it is a fixed amount. Because children's memory is still developing, children's memory is strengthened by multi-frequency and fixation. When you get older, you can start to reduce the frequency or increase the quota slightly. For example, Rockefeller pays 30 cents a week when his children are 7 to 8 years old, 1 1~ 12 years old, 1 USD a week, 12 years old and above, and $3 a week.