Children, assuming they all have healthy bodies and no underlying conditions that might impact their development, all tend to follow a reasonably similar pattern of development  over the first 12 months of life.  However, after that, the timing of the development of skills can start to vary a little more - why is this?  It is as a result of the opportunities and experiences that children are given in order to develop.How is it that children learn new skills?There are some key ingredients: