After you file

In accordance with the attribution rules, if your child is under 18, the income is "attributed" back to you and claimed on your tax return. However, the attribution rules do not apply if the money that is being deposited in these accounts comes strictly from the CCB (or UCCB, Family Allowance, etc). 

DEFINITION of 'Attribution Rules'
A set of rules created by CRA that prevents investors from transferring assets between family members with the intention of avoiding taxes.