My husband and I did this with our children 8 and 5 back in October. It was a big hit, and my kids asked to go back to EPCOT the next day to complete another mission. It is very exciting to see what pavilion you will be working in.
My suggestion is if you have two or more children you should split up into two different teams. You will have two different missions and the children will each have a transponder of there own, and get a chance to locate the clues on their own.
I can’t recommend this attraction enough. Another creative idea for Disney. It really made EPCOT a big hit with my kids!