Chickens have a strong natural instinct to lay where others have laid already, and while most hens have no trouble laying in a new nest box, the odd one might just need a little encouragement.  
 
This set of 3 rubber eggs have been predrilled, and come with cable ties for you to easily attach them to your nest pad so they don't roll away, and provide a little more encouragement to your independently minded hens!
 
They are of standard hen egg size, and are made of rubber.