At what age is it ok for a child to start sleeping with a blanket

Question

i have one and a half years old

Answer 1

Around 12 months.  

Answer 2

I don't see that being a problem.  Our 2 year old had a blanket at around 1 year.

Answer 3

That is a good age. It is much better than having your child sleep with a bottle or pacifier.  

Answer 4

That would be plenty old to have blankets at night.  Whether for warmth or just security blanket.  I actually started giving mine one at about 7 or 8 months.