I think it's fantastic that she has the opportunity and freedom to express herself in this way - she is obviously using quality materials. I think art is an important thing for a child, and something which is so badly taught in schools. If only more children had the opportunity to paint like this.
The paintings are lovely and bright and colourful, but anyone who si prepared to spend that kind of money on it is crazy. Although, like Joolstoo says, considering some of the things that pass as 'art' these days, these are by comparison, pretty good.