Singin with Spidey

I tried to catch Caleb singing with his toy Spiderman without him noticing, but clearly did not have success...I'm surprised he still went back and sang! For some reason when he sings he doesn't say the words clearly - I think he's trying so hard to keep up that he just mushes all the words together! I love it when he sings. The itsy bitsy spider is one of his favourites, as well as Jesus Loves the Little Children and Zaccheus (especially when he gets to say "kee-us, you come down!").