This homemade t-shirt was a hit with my husband on Father's Day, although this would also make a great gift for mom for Mother's day or any occasion. Change the wording a bit and it would also be great for grandparents, uncles, aunts, etc.
Start out by laying the t-shirt out on a flat surface. You will want it on the ground or on a low surface because you will be stepping on the shirt. Cover the area around your t-shirt with newspaper or something else that will protect it from paint covered feet. Place a piece of cardboard inside the shirt so the paint doesn't leak through to the other side. You might want to keep a large container with warm, soapy water and towels near where you are making this t-shirt.
Squeeze some fabric paint onto the styrofoam plate or shallow dish and spread it around so a thin layer covers the entire plate. Simply step onto the paint, making sure it covers the entire bottom of the foot. Carefully step onto the t-shirt. In the t-shirt pictured here, I used a different paint color for each one of my kids. Let the paint dry completely before you move the shirt.
Once the footprints are dry, use a black fabric paint and write "My Kids Walk All Over Me". You can also do the back side of the shirt once the front dries.