A piggy bank is a common name for a box of accumulated or coinning. Generally, piggy banks are used by children. Piggy banks are usually made of ceramic or porcelain. Celts aim to teach children to save. In traditional piggy bank, money can be easily entered, but if you want to take the money, the piggy bank must be solved. But modern piggy banks have a rubber hole on the bottom, to make it easier to take the money stored in the piggy bank.