I was dubious about buying Bristle blocks, after reading a number of reviews that said they didnt fit together properly etc. I found that they do exactly what I expected them to do. They fit together well, though not too difficult to push together, and the colours are good, and there are lots of interesting shapes, none of them too small, including 6 wheels. The bonus feature is the set of figures of a family and farm animals, which my 18 month old boy really likes. He is more into making the animal sounds than he is into building farmhouses or tractors at the moment, but I'm sure he will grow into it. So maybe the company have sorted out the kinds of problems that others were experiencing - I just bought this box for Christmas 2013.