SCP 862-77 (the fun house box)

Scp 867-77. Object class:unknown. Scp 867-77 also known as the fun house box is a small toy box. When entered the box looks bigger then the outside. We do not have all the data since it was not contained yet all of this was told from a father. He said that his child would be in their room and then be gone.
He would ask them were they were and they would say “the big house. In the toy box” when the father looked in, nothing was there. If we can get in and test on it we may be able to know what it is but until that happens we don’t know much about it. If you have eny info on it please tell us.
Last thing we know is that in the basement of the toy box house their is 4 layers Of white glass In it.