Kirk is a similar age to Cara (just under 14mths) and also goes in the kitchen when we go out. When I go out I make sure that there are loads of toys thrown in different areas of the kitchen and also give him his filled Kong. I also leave the radio low on as well as I sometimes wonder if it is noises outside that get him a bit riled and that starts the behaviour.
The only thing that he will destroy if left for longer than a couple of hours is my rattan kitchen chairs

I have now started to move these out of the room as the bottoms of them are ruined and I don't want to get new ones until his chewing stage is over. In the past he has also chewed two corners of my table