Blueprints To Fool Mum

I found this great drawing of a machine that Leith is designing to sense when I am coming to check whether he is asleep of not. It warns him of my imminent arrival and through a complicated system of cogs, trip switches and a little wind energy, the machine turns off the light and the TV to simulate a sleep environment. One min after my departure, however, it turns it all back on again without him having to leave his bed. I think I might have to make cuts in the research and development funding budgets!