We LOVE the Flower and Garden Festival--this will be our third year to attend!! There are several activities for kids including a butterfly release and a maze. Check here for more details http://www.wdwinfo.com/wdwinfo/guides/epcot/events/ep-flower-garden.htm. There are also tons of great photo ops. We'll be there June 4th and 5th
We were there last May during the festival. DF loved it, I was amazed with the Topiaries (spelling?) She decided to take a photo of everyone she could find We had fun though, not too sure about the kids part, they might not care for it too much