You can make almost everything out of foam. You can use these steps to make your own ideas come to life. It's easy, somewhat fast and it's cheap. Think about it... Go to your local decor store pick a piece of art and compare the price to make it or the price to buy. But then again if you make it, it becomes priceless.
Step 1: Find the Piece of Foam; Gather Supplies
You get foam from hardware stores, superstores, craft stores, etc.
Supplies I used were...
Crafting Foam or Styrofoam, tho crafting foam works easier
Type of Hand saw for cutting foam into shape
Wood glue/ Elmer's glue
Plaster of Paris
Popsicle sticks (mixing)
1" brush or sponge brush
Step 2: Mark'n'Cut
Mark your creation on the StryoFoam n then cut it out
Step 3: Sand'N'Coat, Sand 'N'Coat, Then Sand'N'Coat
After cutting out what you are going to make sand it as smooth as you can. Mix gesso, wood glue, and plaster of Paris together. Spread the mixture over your creations and let dry. After drying, sand again and recoat, repeat this step till desired smoothness.
Step 4: Paint
Paint your creation and coat with mod podge to seal and protect. If sealed probably you can spray paint the piece and have no problems.
Step 5: Put on Display
After all steps are complete, put your new beautiful piece of art on display for all to admire your creativity and money saving skills