Moisten enough cotton balls to cover the bottom of a cup or plastic bag. The cotton should be damp but not dripping.
Place the cotton balls at the bottom of the cup or plastic bag.
Place the number of bean seeds you want to germinate on top of the cotton.
Close the plastic bag or cover the cup with plastic wrap. Place the bags or cups in a sunny window and watch for germination.
Transplant the germinated bean plants into your garden if you want to grow them to mature size.