Hey!

I'm looking for some tips in creating that colurfull style.

Something like Happy Tree Friends or some flash games from Newgrounds.

How to achieve that effect from classic flash games like Dad N me?

I'm also interested in those eye-candy backgrounds. How to make it in free software?

Is it just matter of thick border?

How to achieve this effects in gimp?

For cartoon style you should be working with vector graphics and GIMP is raster image editor. You should rather be using something else such as Inkscape which is open source (=free) for it.

I'm sure you can find some cartoon style tutorials for Inkscape.

oh thanks, I already have an incscape so link is much appreciated :)

Good thing that you told me that vector is better for cartoons than raster