How Do You Know If The Baby Hamster Is A Boy Or A Girl?

You can tell the sex of your hamster by holding your hamster securely on it's back.  When you look down by the tail, your hamster should have two holes.  When the holes are close together near the tail, then it is a girl.  If it looks like there is a space between the holes, and one hole is near the tail and the second is a little bit away towards the belly, this is a boy.  As the hamster gets older it should be easier to tell.

When the hamster has like 2 oblong things near its tail then its a boy but when the hamster has none of those oblong things then its a girl

I think it's best if you just take your hamster to a pet-store. And ask them and they'll help you (try asking a Pet-store that sale hamster)

They each have 2 holes, girls holes are close together boys are far apart and plus boys have big buts :P

I want to no if my hamster is a boy or a girl

The longest one is correct, and the one that said to take it to a pet store, most of the time they have no idea whats what unless you can actually see on guy.