Here are a few things I've heard children sing:
"Henry's bible! Henry's bible!" (Send revival! Send revival!)
"Faith, I can move a mountain, I have got a big surprise" (Faith I can move a mountain, I can do all things through Christ)
"You are a bubble king" (You are above all kings)
Any of your own to add?
Afterthought: do we make songs too complicated for kids or is it a case of the words just not fitting particularly well with the music?