Wash shirts and let them dry to the point of just damp.
Create a heart template. (We googled a picture of a heart and printed it onto a horizontal A4 sheet of paper.) Fold in half and cut our heart shape.
Fold the t-shirt in half. Place the folded heart along the fold of the t-shirt and use a washable marker to trace the heart on the shirt.
Start at the bottom of the heart outline and gather the fabric accordion style along the line. Place 3 rubber bands on top of each other around the outline of the heart
Prepare the dye by following the directions on the box.
Place entire shirt into tie dye bath and let it soak until desired hue is reached. (Ours stayed in for 5-10 minutes … but to help the shirts retain vibrant colours you can keep them soaking for up to an hour.)
Rinse shirt until water runs clear.
Hang to dry then wash in warm water and dry.
Pat yourself on the back for having mad tie dying skills!