Roll a 10 g ball of white paste. Form a teardrop shape. Flatten the bottom by pressing the wider end to the board and rotating it. Hold your fingers near the bottom (so that they touch the board) in order to sharpen the edges. Flatten the body slightly.
Build the cake topper on a styrofoam cake dummy. Apply a small amount of glue on the wooden skewer (where the body will go). Insert it as shown in the photo. I used a cocktail stick, but if you are planning to put the topper on a cake I suggest using a longer skewer (if the stick is too short the topper might start leaning to the sides).