Turn empty plastic bottles into a fantastic art resource with these art sprayers. Fill the bottle with paint or coloured water (liquid water colours work well) and spray away for large scale creative fun. The spray action is great for developing finger strength.
There are loads of amazing art projects you can do with liquid water colours (have a search on the web for inspiration) but they can be cost prohibitive. These powders allow you to mix up your own, still retaining the vibrancy but at a cheaper cost.