It is a very expensive mattress and nothing more. At first, we used it as a mattress on the floor and sat on it while the child was a baby. The pieces are connected with Velcro. Over time (as we collected it every day to clean the floor), the Velcro started to come off the fabric, as did the seams. Now that the child has grown, we tried to assemble the "house" and the "tunnel" that it has in the instructions, but it does not stand up. The pillows fold in the middle and collapse before we manage to tie the rest. I suppose only if a thick piece of cardboard (each one has a separate zipper) was inserted into each pillow, it would provide some support. However, we did not spend 100€ to cut boxes...