This free energy conservation starter kit from the Tennessee Valley Authority is only available to parts in the Southeast, such as AL, GA, KY, MS, NC, TN, and VA. However, I'm posting it because it comes with two compact fluorescent light bulbs, outlet and light switch gaskets, filter whistle, two faucet aerators, hot water temperature gauge, home thermometer, and a “How to Save” brochure.
I have no idea what a faucet aerator or switch gasket is, but they sound cool. At the very least, I'm sure they could help me with my time machine. So far I've built the core unit and perfected making the “BZZZZZZZZZ … KERPHEW!” sound with my mouth. I just hope time travel actually sounds like that. Otherwise, I'm just some doofus making a weird noise in a large metal box!