Octopuses have different personalities, too. Other than playing tug of war with the feeding stick, I could never get Ollie interested in playing with toys. She had her favorite possessions and slept with an arm around her little glass bottle with a shell in it. But...she did like to play any game with me, my hands, coming my and touching me with one sucker as she passed - lots of things like that. Her intelligence was apparent in her interaction with me, how she watched me and was able to help me retrieve things (handing them back to me).
Ink, on the other hand. loved her lego block. Carol will have to tell you about the other toys she's been successful with.