I need help with my kitten :(

Uh, what you need to get them INTO Germany is:
Rabies shots, a Titer test and they need to be chipped.
Go to your Vet and get all that into action NOW, the titer test takes up to 4 months until it's valid.

When you have all that, before you fly to Germany, get a helath certificate from your Vet that confirms in the pet passport with the shots that the shots are valid.

For clarification and to make sure that you don't need anything else, contact the German "health" office:
0049-69-69021366
0049-69-69074331

or the vet at Frankfurt airport:
0049-69-69074331
       -64502414
       -691506

And I had the best price for flying with animals so far with Condor.

Best of Luck!