Report Tax Free Income for Children

My children each earned over $1500 in 2024.  The earnings are split between tax free municipal bond interest (Box 8, >$1500), dividends (Box 1, <$100), and Bond Premium or Tax Exempt Bond income (Box 13, <$200).  Given that most of the income comes from tax free municipal bonds, do they need to file or do I need to income their income on my return?