Sergio's and my plan was to hide the tools from Manuel/Ata/Suergo and to not mention anything about the kid's wish to have a treehouse in the backyard. But it seemed like the idea was planted in my father-in-law's head, while the kids played in the backyard, because after a week, he came to me with sketches of how to design it. I found it hard to say no to 3 little kids excitement and a willing grandparent, who according to Sophie, "can build annnnything." So the treehouse is going up and happy birthdays to my summer babies.