Here are some basic rules, as copied from TurboTax, regarding your children's 1099-int:
"If the child's income is $14,600 or more, it must be on the child's own tax return. It cannot be included on the parents' tax return."
"A minor who may be claimed as a dependent has to file a return once their income exceeds their Standard Deduction. For tax year 2024 this is the greater of $1,300 or the amount of earned income plus $450 up to the full Standard Deduction of $14,600."
The IRS explains child dividend income here: Topic no. 553, Tax on a child's investment and other unearned income (kiddie tax) | Internal Revenue...
IF you do need to report the child's INT on your taxes (as it is over the $1,300/$2,600 amount), you will be able to do so under the "less common income" section of TurboTax.
I hope this helps you - best of luck!
