Age and memory
The hypothesis that adults and children will have the same learning ability is proven to be false. Adult participants performed slightly better than the children.
This science fair project may be repeated, this time, with a different age group like 15 year old students and 60 year old adults.
Modify the science project experiment, using a different type or number of flash cards.
Relation between age and learning ability - http://ezinearticles.com/?The-Relation-Between-Age-and-Learning-Ability&id=3959025
Principles of adult learning - http://honolulu.hawaii.edu/intranet/committees/FacDevCom/guidebk/teachtip/adults-2.htm
Basic safety requirements