Good Advice would be to go to a wholesale factory that sells nylon mesh that you will need for your screen printing mesh, wood for your frame and various other attachments you will be needing for attaching the frame together. If you were to shop around for the best prices that would be your best bet.
Screen Printing Supplies that you will be needing
Wood strips measuring 8 1/2 x 11'
staples to join the nylon over the wood. A staple gun is a good idea for this.
water-resistant masking tape
old newspapers to prevent mess
a piece of cardboard to insert inside a double layer of fabric such as a t-shirt or a cushion cover
stencil of your design
The quick, easy way to build a frame
This is a nice project for your kids to do in their vacation, what is more it does not cost a lot
What they will need
hod podge glue
Divide the embroidery hoop in two and insert the nylon material between the hoops. Glue them together and cut away the excess material. Leave it to dry.
Find a design that you like and trace it onto the screen
Take the glue and paint where ever you would not want the ink to go on your shirt.
Place the cardboard inside the t-shirt otherwise it will seep through to the back
Put the screen on top of the t-shirt
Place a blob of paint on the screen and move it down in one action with an equal amount of pressure, making sure everything is covered.
Wash the screen in cold water.