My third child was not quite 6mths old when we started using a blankie with her, but it happened by accident because it was about this time of the year too actually and she just needed a light blanket for her day sleeps so I gave her one and she took to it right away - she holds it to her nose with one hand while she sucks the thumb on her other That was 4 years ago and I"m pretty sure we are going to be stitching it into her wedding dress ROFL So getting it off them can be a downside to them having a blankie.