An apple is 

as juicy as a carton of apple juice

As red as a white tomato.

A lake is

As big as the air surrounding it

And as deep as the Mariana Trench.

A pen is as inky

As a squid 

Like a inky leaf.

A stick

As brown as a cow

Like a big branch from a tree.

The solar system is 

As big as all our planted combined

Like a new world for astronauts.