It is much cheaper than the offline mechanism. My buddy's children study in a well-known early education institution here, and the fee is twice that of the small step. To tell the truth, his son, like my son, didn't learn much, but he learned well with small steps and quick steps. He will always know "silly scouring" and "silly playing". My son is also very naughty, but he is methodical and smart. Not bragging!