S.W.
Wow! I'd like to be your kid...
When you sort through toys and clothing no longer wanted, do you have them do this? Are they placing things in a box and then taking to a shelter? In other words...don't have it picked up by some mystery van that takes it away to a mystery place.
Depending on where you live, google "shelters" and find them nearby, children's foster care facilities, the Salvation Army food kitchen. This is where reality will be right in front of them. Perhaps a dialogue with some other children or frequent visits will establish a sense of "good fortune" that is so important to share with humanity. Volunteering is what I'm getting at here. Your local churches, synagogues can steer you in this direction.
Good luck and many Blessings to you, S.