We had ten or so junior scientists gathered to make egg-protectors. All of the kids, even the four year olds, really got into it and were able to explain what principles they used to protect their eggs.
Parents were a great help. At the end of Science Club, a small faction of girls -and one boy- gathered to start the Lemur Salvation Association. Apparently they are going to meet weekly and pay dues of .50 per meeting to evict the humans who have moved into Madagascar and thus hastened the impending extinction of the Lemurs.