InstaPaint is a Microsoft Paint clone for OS X - in other words, a basic picture editor that even kids will find easy to use.
It's not often that a Microsoft product gets remade for OS X but InstaPaint is more or less a version of MS Paint which comes by default with Windows.Be warned that it's not quite as simple as Paint, but it follows a similar pick-up-and-paint format and is easy to learn with just a little perseverance.
InstaPaint is an extremely simple app – don’t make the mistake of thinking it’s a photo editor or replacement for an image editor like Photoshop. You've got a toolbox which allows you to use a brush, rubber, color palette, area selector and little more than that. In other words, InstaPaint won't appeal to any serious artist but it could be useful to keep your kids happy for a while or simply if you want to doodle a few minutes away.
You can save your InstaPaint masterpieces in most major formats,also you can select one default save format (.PNG).