The matching contribution from the government is capped at $6,000 for your second child, and $12,000 for your third child. The amount is also $12,000 for your fourth child. The CDA is sometimes also called Children Development Account. To open the CDA account, you need to go to a POSB branch.You can use the savings to pay for education and medical-related expenses for. of your children.ee also my calculations on how much your children can get. (The total is a whopping $68k!). When your child enters primary school, a Post-Secondary Education Account (PSE) will be created for your child. Unused savings in the CDA Account can * be transferred to the PSE Account.