Here are a few examples:
Ryan says refrigerator as "fridgelator". It is so cute that I have never corrected him!
Computer is pronounced "pewter".
Ryan calls his butt his "tootie". Every once in a while he will call it his "bootie" but that's about as PG as it gets so far. I love this innocent stage.
One of my favorite things that Lucas says is "Ry-Ry" for Ryan. He says it with such affection for his big brother.
Lucas also calls muffins "muff-muffs" and French fries are "fry-frys". Are you sensing a theme here with his speech?
There are so many other cute words I could list. What cute mispronunciations do your kids make?