If the characteristic is eye color, what could be two different phenotypes? can someone explain this to me .

The phenotype is just a characteristic/trait. 

For instance Brown and Green are phenotypes of eye color. 

This can also be used in Punnet Squares, and could be displayed as B and G. 
B equaling dominant Brown, and G = dominant Green, vice versa to g and b where they are recessive. 

An egg, or a sack of flour

Reproduction i think