Buy it and got to his/her room. Click GIVE HER ONE and choose it. You can only give a baby ONE snuggly per day.
Go to your baby's room. Make your baby is NOT wearing his jammies. Click on the tab that says Rest and then click on Lie Down. Now there will be a link which says something along the lines "Your baby is not wearing his jammies. Do you want to change his nappy?" Click on the link which says something like "Your baby does not have a snuggly. Do you want to give him one?". It is located above the boxes which shows the different outfits your baby could wear. Obviously you need to already have a snuggly in your inventury. There is one "wellness snuggly" which means the snuggly that suits your baby the best. Finding that wellness snuggly will increase the skills you gain with each activity. It is a guess and check kind of thing. You can only give one snuggly per baby per day. Hope that helps. And if you are wondering what Babydow is, it is a great online game where you can look after a baby. Put RainyMeadows in the mentor box. Hope that helps. Remember to put RainyMeadows in your mentor box otherwise you might run into a few difficulties.