Science projects Experiments 21 Design and construction 15 Science 12 Electronic apparatus and appliances 9 Juvenile literature 9 Prototypes, Engineering 8 C (Computer program language) 6 Microcontrollers 6 Programmable controllers 6 Programming 6 Schools 6 Science fairs 4 Study and teaching (Elementary) 4 Force and energy 3 Motion 3 Study and teaching 3 Activity programs 2 Bullies 2 Bullying 2 Electricity 2 Exhibitions 2 First grade (Education) 2 Friendship 2 Handbooks, manuals, etc 2 Humorous stories 2 Interpersonal relations 2 Matter 2 Properties 2 Solar system 2