I came across a rather nifty game called Grow Cube the other day. Doesn't take much effort, but it does take some thinking. It's worth a try, if you're bored and have nothing to do. ^^

http://www.eyezmaze.com/grow/cube/

Took me a while to figure out how to max everything out though.

Goddamn this game is annoyingly addictive...So far I have maxed out everything except the pipe and the ball...

Edit: I have now completed it...hmmm...I'll have to show this to my sister...cool game...