Rather than responding to each colored light on plants, coke, juice and coffee on plants project...

http://ei.cornell.edu/toxicology/bioassays/Des1idea.asp

http://www.ars.usda.gov/is/kids/plants/story5/planttouch.htm

http://web.ukonline.co.uk/webwise/spinneret/plants/plantm.htm

Instead of Coke on nails, Coke on eggs, Coke on plants ....

http://www.pasco.com/experiments/chemistry/march_2002/

http://www.rohmhaas.com/company/plabs.dir/htmldocs/soda.html

Beyond candles....

http://www.rohmhaas.com/company/plabs.dir/htmldocs/soda.html

http://news.uns.purdue.edu/UNS/html3month/031021.Faraday.2003.html

http://www.thebakken.org/education/SciMathMN/faradays-candle/faraday.htm