Yeah, a few five minute cartoons aren't too big a commitment. My friend, who actually has children, has seem them all a million times in English, so when she switched to French it was like she already knew what they were saying. I know your kids are older now but maybe there's a French dubbed thing on Youtube that they watched when they were younger. (Provided it's not Barney. That would drive me bonkers.)

If you do give it a try let me know how it works!