Is a cluster of mobile lymph nodes on back of 2 yo neck normal. all different sizes. they seem like they are all together but i can feel each one?

Yes: There are thousands of lymph node located around the body.Many in the neck, head, behind the ear are prominent in kids as they are not buried in tissue . At rest these are often 1/4 inch in diameter and may grow to marble sized when reacting to a stimulus. Bug bites, or viral infections can increase their size to 1 cm or more.Most will shrink down to pre-stimulated size over 3-4 wks.

Pediatrician: Swollen glands in a two year old requires an exam especially on the back. Please see your pediatrician.