A create a miniature time machine. It took me two years. I get one of my friends to press the control lever.
The machine fades away, nobody knows where to! One friend says it's a clever trick, but none of them, even an expert illusionist, can work out how it's done. But even if it was a trick, isn't that the whole point of time travel? To show that impossible things can be possible if we think about them enough? They admit that this is even more impressive than the ghost I showed them last Christmas?
I'm also working on a full size version, and it's almost ready. Should I show them? Would that be safe? Or should I use it myself? What if I could never come back? Or do something else? Like, maybe find out where the model went? Or find out about that ghost?