An interesting baseball card site on Pinterest

I'm not entirely sure what Pinterest is - seems similar to Tumblr - but it has gotten a lot of hype recently. Yesterday the author of a baseball card site on Pinterest contacted me and I thought his site looked like fun so I am sharing it here - it is called Mybaseballcards and categorizes cards into different funny sections like:
"Uncategorizably Weird Expression"

"Your Grandma's Glasses"

"Look at the size of my bat"

Check it out. It's funny.