I bought the Color Wonder Magic Light Brush for my daughter who loves to draw and paint. The product is advertised as Mess-Free so that was very appealing.
The product consists of a brush unit which contains an attached light up brush and a spot to place the paint set. You need 3 AA batteries for the light up magic brush, which are not included. This kit comes with a set of six paint colors and a 30-page pad of color wonder paper. The product will only work with the special paint and paper and you can buy replacements as needed.
The paint texture is similar to a thin gel, and is opaque in color. You dip your brush in the color paint you wish to use, and the brush lights up with whatever color you are using. It's not as bright in color like the box portrays, but its pretty and my 3 year old loved it. When you start to paint, the gel paint goes on clear, but within seconds it turns the appropriate color. In between using colors, its recommended you wipe the brush off with a napkin or towel.
Only downsides? It can get messy using the gel paint, but the good news is that it won't stain and is easy to clean. Also, if you don't wipe the brush well in between colors, you can mix the paint colors.
Overall this is a great product! Its recommended for ages 5 and up, but my nearly 4 year old plays with it just fine, just use your judgement with your own little one.