Well-being room makeover

We are redesigning the room behind the library, formally known as the rainbow room. We want to make it a calm space for children to relax and have some quiet time, as well as a place for play therapy. Our budget for this is small and we are looking for any contributions of the following:

Mirrors to go on the wall above the radiator cover

A sofa!

Photo/picture frames of any size and shape

Any other creative ideas or input!

The current space, with freshly painted walls and new radiator cover the first steps to creating our well-being room.