So what will be the best way to make some coins on the net without to have set up a mining rig? (I only have a laptop with not much power)
Maybe websites who give away coins for reading them or do some games on it or wil it be possible to set up a free online desktop enviroment en get it running a minner?
Most of those websites will only give you a few satoshis and you'll have trouble spending all that dust.
You can get bitcoins the same why you get money , and the only reasonable way and risk free is working.