This was my Year 6 Book Nook. The kids loved it! The gazebo was rather expensive at £53 but luckily the Headteacher was feeling generous that day. :-). I bought the Emoji cushions myself at £4.50 each from e-bay. The cushions are an old mattress topper test I cut up and I bought the pillow slips from Argos for £2.00 for a pack of two.
When you want mattresses for the entire family, you might want to consider going to the same mattress store. That way, you're not going all over the place, searching for the perfect mattress. One mattress store will have mattresses for you and the kids.