The age limit for child plans depends on the type of plan chosen. For mutual funds, a parent can invest on behalf of the minor child. For Sukanya Samriddhi Yojana (SSY), a parent can invest towards a girl child before she turns the age of 10. The maximum entry age for SSY is 10. For ULIPs, a parent can invest in ULIPs for their minor child up to the age of 18 only. This is the maximum entry age for these plans.