Take photo's and send to the other participants. Extended activities examples Global awareness, identifying other participants locations on maps, talking about the weather in those places. Time zone differences, etc. If the clown has rotten teeth then a discussion on dental health fits in here. If the hair is 15 inches long then measure out 15 inches.
Any evaluation method used per each subject, evaluates it for that subject.
Using descriptive vocabulary creating the assigned physical feature of the clown. The understanding the the communication took place over the computer rather than phone lines or the regular mail is a plus.