World Showcase was my 8 year-old's favorite part of Disney last time we went. Our kids were 8, 6, 4, and 18 months at the time. The older three did the Kidcot stations, but we also went "hat hunting." They tried on regional hats from each country, and we took their pictures. The only country without a national hat was Italy, so they balanced soccer balls on their heads! I also told them if they learned how to say "hello" in each country, they would win a prize (ice cream at the end of the night--which they were getting anyway).
We might have lingered in the shops longer without kids, but everyone stayed happy--no meltdowns--during our "world tour."