You will need: A t-shirt, paper, linoleum, a cutting set for the linoleum (i used the ABIG), a roller or small paint brush, and screen printing ink. I picked up the block printing stuff at a local art store for like $20 total. The paint usually goes for around $8. Plus you already have a t-shirt.
Start by carving your block with the design you want. I sketch the design in pencil first and then carve out the parts that i did not draw on. You are making a negative when you carve so whatever you carve out will not print.
Test the design on piece of paper first.
Paint a thin layer of screen printing ink on the block. Stretch the shirt over a piece of cardboard and then press the block down.
Once the ink is dry iron for 3-5 min on each side.
Unrelated block print of cows.