B.S.
Since I provide care for children in my home, I have a five foot tall tree that I put in the middle of a round table. I put a colorful tree skirt around the tree stand and it covers the table-top. So, the tree is about two feet off the floor. It's so handy to have the table top for smaller gifts and larger ones can sit under the table. Works very well. The toddlers can stand around the edge of the table and look up at the tree and can almost touch the lower branches of the tree.
I used to have a huge 7 foot tree and used a pen around it, which was nice...but the kids had a tendency to lean on the pen at times and would drop toys over inside it. It still worked fine for a number of years.