This is Kris. He can't find his way home because its night time, and there is no electricity in this prehistoric world. Kris is very sad because he isn't able to get home.
FLASH! BANG! For a brief moment Kris sees the whole sky lights up and Kris can finally see his home, but he sees what might be another person there. He walks as far as he can before the light is gone.
Light Bulb (Resistance)
Kris is finally able to make it to his house in the dark. " What are you, I knew i saw something a while back." Then the shadow figure says to Kris,"I'm from the future, and I bring a gift. The power of electricity." Abruptly he says, " I must go!"
This confuses Kris greatly, however the shadow man from the future left him a gift. The power of electricity. Kris still doesn't know what electricity or what ever he was given is because he has never known.
Kris takes a closer look at this object and ties to figure out what it is and how it holds fire in a bottle. As he looks he sees the components of it are labeled, yet he still doesn't know what it is.
Battery (DC Power)
After many years of tinkering and hard work Kris finds the secret to making these, and he sets them up around his house. Now he won't get lost again.