Students put the tape player on one end of the planter and prop the books up on the other. When it is time to use the center, students get a pillow or a blanket to put on the floor and then they get started.
I don't like to mess around with headphones. I teach the students to keep the volume low. Now I have need and usable listening centers.
Quick Note: During Independent work time only one student is allowed in each center, but at free play time I allow 3 students in each center.