This is what I made for the Wonderkid to wear to school today. I thought he needed a new shirt for Valentines Day. I partially chose this because one of his teachers refers to him as a love bug. The bug and the words "love bug" come from Simply Charmed cart. The "I'm a" is Mickey Font. Using Design Studio I added the heart to the "o" on "love" instead of the smiley face from the cart.
I used four colors of heat transfer vinyl (htv). I use my regular iron but I iron it on my washing machine as opposed to an ironing board. I've heard other people say they used a cookie sheet, I think that is likely to work also. I also use a small sheet of teflon to make sure it gets good and hot.
Here is a close-up of the shirt. It is tought to tell in these pictures but the lettering is pink and the heart is pink. It looks pretty cool in person, a little washed out in this picture, though.