After putting it off for a year and 1 month, I finally tackled the heart-and-back-breaking task of turning Paxton's bedroom into a regular ol' guest room.
I gave his remote-control monster truck and kid-friendly tool set to a neighbor kid. I'm going to take everything else to EcoThrift.
I'm keeping his Treasure Jar, his bottle cap collection, and this little box I made him. The "Wish Box" has a little cherub on the lid. You lean the cherub back to crack the lid open juuust enough to whisper a wish into the box, and then snap it shut...otherwise, your wish might escape, and it won't come true.
Time to sit in my recliner til the heart and back aches pass.