I have two dependents in which I have not received their $500 stimulus. I have gone to the IRS website but it has not been helpful. How do I receive their money?

Both of my kids were filed for 2018 and 2019. I filled out the non-filer form on the IRS website and hopes that will help as that is all that I have seen to try to get the dependent stimulus. I do not want to wait until 2021 to get their stimulus. Any help would be appreciated. Thank you