... a contraption that you “plug” into your brain to enable you to speak different languages as and when you need them (very handy for travelling, don’t you think?)

... a shoe that changes colour/style by pressing a little button on the sole (again, I have travelling in mind)

... a shower radio/CD player that actually works IN the shower (I’ve yet to come across one that still works after a week!)

... a weight-loss product that works while you sleep and is as healthy as anything (just swallow and see the results the next morning ...)

... car keys that find me all the time, instead of the other way round!

Maybe this is a bit tame for a mad scientist ... then again, I’m neither mad nor a scientist!