Beware - if your kids do this one time, they may insist on doing it every time you go to EPCOT. It could be the only thing you get to do while at EPCOT. Way better than rides, shopping, eating, characters. Let's all sit around and color like we do at home for free.
However, it is a fun distraction. Not much that young kids like to do in WS, so you could offer to watch the kids while your DH/DW shops. Or, you could sit and enjoy each of your "Beers around the world".
The CMs really seem to enjoy working kidcots, and they do rotate through the shops and attractions so it's not kids all day long. Ask the CM's to write the kids names in different languages, or teach the kids to say hello in each country.
Canada is right outside the exit to O Canada now. I liked UK because the characters come right in the shop by the kidcot. France has a little shop to look around in, or you can get a pastry. Japan has a film by John Lassiter about wind-up tin toys. AA has a shop to look at and funnel cakes next door. ...(sorry, falling asleep between Italy and Norway)...
Mexico has a "send a postcard from mexico" touchscreen kiosk right by the kidcot.