My son went through a period of doing things like that. You have already done what I would have said to do about the coffee
and inn tables.He is going through a stage that most boys go through.All I can tell you that be glad isn't any higher than a
foot or two at best. Mine never really got to climb on anything higher than that. Falls are going to happen so be ready to pick
him up and look him over. He is tougher than you think he is. I
know from experience that is the case.
Ray went from that stage to pulling out my books and videos tapes. I was always going behind and picking them up. He grew out of that too.