Brickulator.

Available as an app or pre-installed on good but very low price phone with ads.

If you download and install the app:  On restart this app appears to have completely removed your phones OS and replaced it with a simulated Nokia 3310 including keypad and menu buttons. Your Nokia 3310 sim is fully functional, you can make phone calls, text and play snake etc. Unlike the original there is a option in the menu to download and install new games. If you complete snake or a downloaded game you will open up a Sony Ericsson T610 or similar era phone which you can choose from, depending on points, when selected this replaces the Nokia. Your new Sony Ericsson T610 is fully usable as it was with colour screen and that cool glowing joystick, plus you have the extra option of downloading games which if you complete you will win the next generation phone maybe even with a operational camera... You route will vary depending on points and what phones you pick but eventually you will get to OS's like Symbian, Android and iOS but these may have to be GTA style versions of the OS's to avoid copyright issues.

This, especially on pre-installed phones, could have the option of 3 lives. If you loose your 3 lives your phone is bricked. The end. 

Inkless Printer

I'm pretty sure a laser could precisely burn normal paper to a sufficient dark brown colour to a similar quality as a photocopier. I for one would be happy to forfeit a loss of quality and colour for a printer that never requires and consumables. Why does nobody manufacture an inkless / tonerless printer? Is it because they don't know what to call it... It's not really a printer is it, maybe I'm just searching for the wrong thing...

Domestic water wheels

I wonder how much electricity you would generate if you connect a small hydro electric power generator to your tap? Would it be better for the environment? It would probably be cheaper, unless you have a water meter. It seems a bit wasteful for the water companies to clean all that water and pump it to your house only for you to leave your tap running to power a light bulb or two.

Maybe its possible to have small hydro electric power generators on all your waste pipes? The problem being they could get clogged up easily unless they were cleverly designed. Maybe a wrap of tiny water wheels around the down pipe may do it. Small turbines on your heating system could get some energy back? Small turbines on your pipes before the water exits your taps my be beneficial, but may tempt people to leave their taps running?

Number two. Perpetual motion.

Polar energy bank.

A very tiny generator that may create the tiniest amount of power, but maybe if you have enough of them something might happen? I don't suppose it's any better than solar power, except, maybe, it works in the dark....

A sequence of magnets around an axle, each with their positive side pointing to the north pole. This side is drawn to the north by the the tiniest amount until it is pushed away by the negative side, then in turn this happens to the next magnet, creating motion. I may need to be in a vacuum, or at least have very good bearings

I think maybe it has already been invented and can be found in barometers but i'm not sure....

Number one. The Larch.

Cheese on Toaster.

Patent number 1.

So imaging a toaster, on it's side with two CD player style draws that move in and out at the touch of a button. Underneath the drawers are two leaves of silicone that protect the lower element from crumbs and tip them off when the drawers are ejected. Simply put your bread with cheese on, on the drawers, press go and after two and a quarter minutes, lovely cheese on toast! Mmmmnn...