Stir the kneaded concrete 
according to the instructions. This kneadable concrete is a low-dust air-drying Modelling clay, concrete that is very easy to work with. It is very smooth and is suitable for interior and exterior decoration 
Now form the plasticine around the 
polystyrene balls and design your desired birds. The size of the chickens depends on the size you choose.
Now you can put the feet 
into the mass and if necessary bend them into the right shape 
From 
wire you can then make and insert the beaks. For our beeper sets we have wound up the wire for the beaks. For this you can use bamboo skewers 
or toothpicks.
Let everything dry well until the material is very hard. Then you can 
put on the caps and paint on eyes. Of course you can also decorate the birds according to your wishes. How about glasses made of wire or a straw hat, for example?