Is there a pan for Baby Blocks. I have not seen them anywhere...any suggestion. Also, I am looking for a small baby to place under a fondant blanket on a cake..i have not had any luck finding those either

I haven't seen any pans for baby blocks--2D or 3D. You would need to cut them out of cake.

3D block cakes
http://members.nuvox.net/~zt.proicer/cakepict/novcake.htm

For a baby under the blanket, you could use just a small baby doll or a cake topper...
http://www.sugarcraft.com/catalog/novelties/babies/babies.html#bab

I've made a baby blocks cake before and I used a six inch square cake pan. I made 3 blocks with 2 layers each.