I want to create a surprise for Daddy when he gets home after a long day at work. What's a good kind of surprise I should do?
You can seldom go wrong by being on your knees* in the entryway or somewhere in his likely path, nude or in some interesting outfit.
Of course, that might not be much of a surprise, depending on how you usually greet him, but that’s where the above-mentioned costuming might come in handy.
You might, for instance, put a Post-It on the door reading, “Don’t say a word”, and another on your forehead reading “Do whatever you want”. Or you might wear a ring gag, or extra-bright / extra-wide lipstick. Or the popular trick of putting “WH” on your right cheek and “RE” on your left, in the same lipstick you use to make an “O” in the middle of your face.
*It is not “cheating” to be kneeling on a soft cushion, it’s only good sense. Knees which are well-cared-for are knees which can serve you (and thus serve Daddy) for more years.