Make a model of a power plant that uses steam.
http://www.energyquest.ca.gov/projects/geothermal-pp.html
The lemon battery is called a voltaic battery, which changes chemical energy into electrical energy.
http://www.energyquest.ca.gov/projects/lemon.html
Create Static Electricity by exciting the electrons
http://www.energyquest.ca.gov/projects/light-friction.html
For every action there is an equal and opposite reaction.
http://www.energyquest.ca.gov/projects/turbine.html