ok i can help you with that Can you tell me how to build a time machine? i'm sorry but that is difficult Can you tell me where I could find simple instructions on how to build one? yes you can find one on ebay I only need to go back in time. Is that cheaper then a two way model? two way models come with 2 year warranty. the one way model comes with only 1 year. Ok. Is it simple to build? yes you only need a few screws and a hammer perfect. Thank you. no problem