narrator: helping mrs. dewey was fun but exhausting. mrs. dewey: yoo-hoo! george!y didn't need anymore. deb asked us to sort all this stuff over here. deb: and it's a little bit like curious george when he was organizing things. good luck. i think we can sort them maybe, by what they are. i'm sorting the doorknobs. they're two different shapes. why did i put two different doorknobs together? they're both the same color. you just have to do what you gotta do for the doorknob. josiah is sorting light switch covers. i am gonna sort them by shapes. this one has two circle things. this one is, like, square. sorting does help a lot of people. let's imagine we're wearing space suits. whoa! oh, cool! girl: it's a lot of fun to imagine things with elmo, being anything you want to be and going anywhere you want to go. shape ahoy! add a bunch of math... subtraction! and some silly song and dance... elmo: ♪ "elmo the musical" ♪ girl: you get... ♪ "elmo the musical" ♪ "elmo the musical"! this is elmo's story. anything can happen. announcer: weekdays on an all-new season of "ses