Yes, to purchase. Online, if you use a search engine like Google. Then type in Teddy Ruxpin Lullaby, then hit search... Then they will link to tons of songs that will likely have the lyrics too. Not everything needs to be purchased. You would be looking up the info on those lullaby, not having to buy them online. You might be able to see if people have old video of Teddy Ruxpin on youtube. That might give you more things to look at/enjoy too.
I miss having mine working due to battery corrosion. I had to give up my books since he didn't work. I have the tapes still, but with my teddy not working, they are fairly useless unless I run them into a tape.... Which would probably ruin them.
If you know the lyrics... You could post them. If you want to understand them better, I can try to help you out that way...