Yes time and money. I usually start locally as that is the easiest way generally to see if they are legit and the money/time goes to where it is supposed to be.
Also if you have a family there are organizations that are good for kids to see and do. It is a good family activity as well. One is Feed my Starving Children and you can go in for a couple of hours and work as a family together. This one is international to.
https://charity.org/workplace-giving...rving-children