What gender are these chicks?

[LulusLayers]

2 are straight black marans
2 are crested cream legbar with marans father

I lost track of who was who after they came out of incubator. Would love guesses on these as well as gender!

 

[chickenlittle21]

4 looks like a male

 

[Mylied]

I think they are still a bit young to be sure. Give it a few more weeks.