acid
background
battery
bioelectricity
black
cable
campaign
cathode
charger
children school
color
concept
concert
connection
device
education
electric
electrical wires
electrode
electronics
experiment
fill
fresh
fruit
garnet
laboratory
mango
music
nature
nobody
object
plug
pomegranate
positive
power
red
renewable
research
save
science fair
science lab
source
table
technology
turn on light
view
volt
wire
wires
wooden