I am also new to this forum, and from Ontario. sounds like your rate for the three year old is fine but might want to revisit the rate for the other child. I have one set of siblings who I care for just after school and charge 15 each.

I am also asking for opinions for rates for 3 children, one family.
1st child is 1 years old, full day.
and two boys for just after school hours.
currently the rate is $40.00, school year.

what about two siblings between ages of 7-11. 8am to 3pm, summer care
sometime I feel like I am charging to little just to make it affordable for the parents.
thanks