I now charge the same for all ages because here in Ontario we have such a limited range as in 11m - 3 1/2 mostly. But before the days of year long mat leaves I used to have different rates for different ages 0 - 9m, 9-18m, etc. The rates reflected the care required such as a child unable to walk or feed themselves paid more than a child that could. So for special needs children they were assessed based on the skills they had or didn't have as the case may be. So often a special needs child was still at the infant rate even though they were turning 3. If the care was more than what I would be giving a toddler or required extra such as being carried on the stairs or lifted to the change table I would charge a premium - never know when the back will need a chiropractor. I am the parent of an 18 year old special needs child that walks but does not talk, is fed mushed foods and is diapered so yes if she was in my care she would still be paying the infant rate. Unfortunately I don't get paid for her.