Avoid object lessons involving live animals. It can all go wrong so easily.
(Try to avoid asking children questions with all but the most obvious answers, for similar reasons.)
The video below shows what can go wrong when a bald eagle is released in the auditorium at Oral Roberts University.
While the situation of the eagle will evoke concern and sympathy, keep listening to the sermon/message for the students and then you may not know who you feel more sorry for.
Use Bible concepts as the basis for your object lessons.
mgpcpastor's blog 