full of beans

I went to the local Babies R' Us for some fun stuff for the baby boy.  I was eager to find a tunnel for him to crawl through and Babies R' Us did not let me down.  I found a cute little red one with some cartoon characters on it that I did not recognize.  

After I got it back to the apartment a friend looked at it and told me that the character was famous in Japan.  She also said he was a character who has a head full of bean paste.  Wa wa what? 

I looked it up and found that it is Anpanman.  You can check him out here.  I thought it was pretty weird but then started thinking about Sponge Bob Square Pants. I mean, how well does that translate?