How much per child per month?

My husband and I each have an endowment plan. I set aside $100+ and husband set aside $500+ for the endowment plan. Our plan don’t mature at the same time but by the time it does, we would have about $60k to draw out when LO enters secondary 1. We started this endowment plan even before we were married and conceived, so must start young. Now that our LO is about 5mo, we contribute $300 each and put into a wallet and that will be for essential things like diapers, milk powder, wet wipes and if we have extra then those will be used to buy some nice clothes for LO, or whatever is necessary.