If you want to mine Bitcoin from your laptop, then you won't make any profit (unless your electricity is unlimited/paid for).
If you want to mine another cryptocurrency then you could look at StorJ or Burst which mine using you hard drive space (you may not break-even on these either).
There are some maining calculators that ou can use online that are mentioned above to see if you will profit from mining before you start. Though if doing it for a hobby, you could use something like the antminer R1.