Or you could just have 2
2 keys are plenty - I hacked together this mini mechanical keyboard using an adafruit trinket and some cherry MX keys bought off ebay:
http://kimondo.co.uk/smallest-usb-mechanical-keyboard-world/
10 publicly visible posts • joined 21 Apr 2010
I've been using my Raspberry Pi as an adblocker running Privoxy - only works on my home network but it's still handy for the various ios / android devices I own.
http://kimondo.co.uk/raspberry-pi-as-an-adblock-server-for-ipad-iphone-android-and-anything-else-on-your-network/
I did get a bit of a backlash from Reddit from techhie bloggers who run ads on their sites though.
Gutted to see this go - I've found this dock really useful as a portable battery powered screen and keyboard for my Raspberry Pi -(via a home-made adapter box) when I first blogged about it you could get one for about £60 on Amazon: http://kimondo.co.uk/raspberry-pi-modmypi-case-motorola-atrix-lapdock-raspberry-pi-laptop/ now they're over £100 which perhaps indicates how useful they are!. I think you can still pick up versions with hebrew keyboards for less.
Works with the playstation too, which is handy when the misus wants to watch X-factor.
There's a wiimote sonic screwdriver available for less than a tenner on amazon at the moment - with DarWiin remote on the mac it makes a nice powerpoint / anything you like remote control. Built in usb chargeable battery, bluetooth and motion sensitive as well.
It doesn't light up or do the whirring noise though.
I've got a Spitfire in the loft constructed from balsa wood covered with tissue paper which I made years ago at school if you want a prettier aircraft design (and a rocket powered spitfire in space would be cool)
On a slightly more serious note, the instructions (it was a very old kit) mentioned the use of a Jetex rocket motor. These don't produce a lot of power but burn at lower temperatures which might be useful if building the model out of burnable materials. http://en.wikipedia.org/wiki/Jetex_engine