If your child is resistant to saving, you might persuade him or her to at least delay spending the entire amount for two or three days.

You may also want to offer an incentive, a benefit that would encourage your child to save.  For example, offer a "matching" grant of one dollar for every one dollar saved.  And, consider opening a savings account in your child's name. (See the Saving room in the Wise Pockets Treehouse.)