Ssssshhhh . . . . . . I have a secret. Don't tell my husband. For years the kids have been putting toys in his boots; balls, cars, paperclips, blocks, small little odds and ends. He usually finds them as he gets ready for work in the morning, but not until he puts his foot in the boot. At which point he grumble about "these kids" and dumps out his boot. He rarely checks his boot first.
In the last few months I have decided to leave my own little reminders of his children and how much he is loved. I, too, have been adding things to his boots. Not all the time, just often enough so he can be reminded about how wonderful it is to be a family man.