Growing Beans

We are learning about seeds and growing plants at school.
Today we asked the question: Do plants need soil to grow?
We decided to plant some bean seeds into plastic bags.
First we put some damp cotton balls into the bag and then we dropped in 2 bean seeds. 
Here we are getting them ready.
Tomorrow we will take photos of them hanging in the windows for some heat and light.
We wonder what will happen next!