giving money to charity?

Try contacting your local county social services or children's services. They could point you in the right direction.
Also, the Marines hosts a Toys for Tots program each year. Look them up online for the area contact. Another thought is to look up a local Gospel Mission who feeds the homeless and provides other services for the homeless and working poor. Bless your giving heart. Merry Christmas to you.

Salvation army bell ringers are in front of many stores now. Drop some cash in their buckets.

Check with some of your local churches or soup kitchens.

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Goodwill and salvation army is the only thing i can think of.

Start with the local homeless shelter and local food bank. Then branch out more widely to programs like Toys for Tots, Blue Santa and so on.

there's a shoebox scheme I used to take part in when I was at school, not sure what it's called, but you'd basically go out and buy stuff then put it in a shoebox and wrap the shoebox up, then a charity would send them all off to different people (mostly children) for christmas. Worth researching

lots of places - local homeless shelters, churches, salvation army red buckets