Tzedakah and children

In the past my husband mostly gave to charity and I mostly helped family and volunteered.

Are there any guidelines on helping children vs donating to charity?

We recently had a baby, and we donate monthly to several charity organizations but we haven’t set apart anything for our son to go to college, and I’d like to start contributing at least as much as we give even if that means giving less, I also want to volunteer with my son once his a little older instead of just donating, I think that’s more helpful for teaching kids. I know helping family comes first, but what are the guidelines on this since he doesn’t need it yet? I think my husband would feel guilty if he contributed less to the organizations, but I want to help my son too.