Get three foam boards one any color the other two white.
Print out your apps.(preferably on photo paper.)
Put your apps on the colorful board
Draw the lines for the boarder of the iPhone.
Exacto knife the board with the drawings and glue it one and then cut the edges and draw the detales
Color in the top.
Spray paint the silver iphone and apple sign
Add velcro to both sides.
And your done