Sure, it's definitely possible. F&W is mostly contained within World Showcase. If you avoid that area you can certainly experience the rest of Epcot. You can also stroll through WS just to enjoy the atmosphere, shops, entertainment, etc. without partaking in any wine. I will say, though, last year we took our boys the same age as yours and I didn't have high hopes for them enjoying F&W....but it was quite the opposite. They LOVED it! They loved trying new foods and really enjoyed filling out the passports (they approached it almost like a scavenger hunt). They enjoyed it so much that we actually added a second Epcot day just to go back and visit more booths. There is a lot to love about F&W even if you don't drink wine. They may surprise you