Numberblocks/Arthur

Cast

 * 7 as Arthur
 * 1 as D.W.
 * 6 as Muffy
 * 15 as Sue Ellen
 * 16 as Francine
 * Pando (from Bing) and Boots (from Dora the Explorer) as The Tibble Twins
 * 17 as The Brain/Alan Powers
 * 19 as Jane
 * 10 as Prunella
 * 12 as Fern
 * 11 as Emily
 * 9 as Buster
 * 8 as Binky
 * 14 as Mr. Ratburn
 * 13 as George
 * 3 as Grandma
 * 4 as Grandpa
 * 5 as Jenna
 * 20 as Mr. Morris