Get him something that just the two of you can do together, ideally outside or in the wild. It doesn't really matter what it is, just so long as it's something

Get him something that just the two of you can do together, ideally outside or in the wild. It doesn't really matter what it is, just so long as it's something you do together. He's at an age now where he worships the ground you walk on, which won't last much longer. Make the most of it whilst it lasts, and give him some great memories at the same time. That's going to be worth way more to him than $TOY or $GADGET.