1997 Dodge Caravan Van dies while driving

I have had to have my van towed home due to it dying while I am driving, all electrical devices still work it just does and then will not start. Just turns over. After it sits for a while it will start right up but then dies again within 20 min at an idle. I have 5 kids and am afraid to drive it anywhere with no way of getting them home. Do you have any ideas what could cause this? I can't afford to take it in and am afraid it will not make it anyway and I can't afford another tow. Thanks for your help