Not all animals can smile. The human smile comes about from psychological responses and triggers hormonal/chemical changes in the body...its not just a smile. We don't have to be serious to learn. The chemistry of fun has been found to stimulate the human mind in positive ways that increase alertness and open a person to new experience. This is a great facilitator for management and team building programs. ‘Fun’ is a glue to human inter-activity. Programs with very serious productive intent have their goals enhanced no matter what they are if the participants are finding the experience fun, and they are sharing that fun with others.