A hug!
Woke up at 3pm and took BBgun to a nearby park which has water attractions of sorts. She made friends with another little girl and and I got to push them both on the swing set while they sang they're abc's and Bah bah black sheep. Then when I left for work at 8pm she gave me hugs and told me how much fun she had today at the park.
Best gift you can get from your kid is to see them happy.