I need to learn to speak in multiple character voices. There are only a few in Jasper Rabbit's creepy tales (Creepy Carrots, Creep Pair of Underwear, Creepy Crayon), but other books have multi-character dialog.

Elephant and Piggy books seem to be my main failing. How did I voice this character in the other book I read ten minutes ago, and how can I make the new character sound different?