A cheap and easy way to decorate your nursery is with letters. You can find letters from online shops and ebay selling vintage wooden letters or even better yet, letters from old shop signs.
HG ( Husband George ) found this S letter from a shop sign that was up for refurbishment and it was about to be thrown away. Scout for closing shops for a cheap alternative of having one made from a sign making shop.
These are usually hollow, so they can be filled with fairy Christmas lights and double up as a soft night light for the room. If you don't want any light switches and dangerous cables, there are Christmas lights available that are battery operated. I have a set that lasted me a whole year with out a battery change.