How to make an array of Forms

I see that a Form does not have an Index property like controls do so how do I make an array of Forms.

In my VB project I have Form1 and Form2. Form1 is the main processing Form and Form2 is used for image display so Form2 only has a Picturebox on it and no code.

During the run I want to click on a button and each time I do this I want another Form2 to show so on 1st click there is only one Form2 showing and on 2nd click there are two Form2 showing, etc, etc