this one. The four balls are what he likes most about it. I've confiscated the hammer because other things kept getting pounded with it and even when used as intended it was awfully loud. Also, it was beginning to splinter.
So what Duke likes to do is put the balls in the holes like eggs in a carton, admire his handy work and then take the balls out again. He has a ball in his hand approximately half the time he's awake.
I think Moo thought it was worth it just to see someone else in a bear-hug style time-out for a change.
I'm pretty sure his motives were purely scientific. Duke-boy's a lover not a fighter. Of all my babies he is the snuggliest. Moo was rather snuggly, but in a different way. Duke's snuggles are more intentional some how.
Bearing that in mind I wasn't surprised to find that Duke is also much more interested in baby dolls than any of his predecessors were. He discovered Moo's baby, Polka-polka, a few weeks ago. He carried and snuggled that baby doll for a good ten minutes before I got the camera out to take a picture of the sweetness at which point he lost interest.