Thank goodness for Amazon, where I found most of the decoration I needed. Somehow the theme "Dragons" wasn't as common as I first thought, and finding cool stuff turned out to be a little bit stressfull and ended up in a combination theme of How to train Dragons & Dragons and Knights themed bash...
But have a look yourself..
The How-to-train-Dragons Cake and Cucumber Dragon-Fingers.
Baby Dragon-Eggs Chocolate Cupcakes and Dragon-Blood-Blackcurrant-Sirup.
A Dragon-Shark-Tank made of Berry Mix-JELL-O and Sugar Sharks.
Here the baby Dragons-Nest.
It was a bit nervewrecking to put everything together... But baby G. was jumping around with joy throughout the whole day, telling us how happy and excited he was, which made the whole organizing hassle (and the cleaning afterwards) well worth it...