In such a situation, if parents have children to deposit Rs 500 every month, then Rs 6,000 will be deposited in a year and Rs 30,000 in 5 years. On this, interest of 6.7 percent will be Rs 5,681 and on maturity, Rs 35,681 will be received. At the same time, if this amount is deposited in the piggy bank, then only Rs 30,000 will come. There is no benefit to interest.