I am in the Robot world. I cannot get R3D3 to play the Treasure games with me to get the blue piece.

I have played in the order of the walkthrough, first the Injun world and now the Robot world.
I have solved the electrical circuit and powered up the entire island.
I have the pink piece.
I can speak to the prisoner robot and have played the IQ game.
The robot has only three dialogs: Have you seen the girl?, What happened to the other robots?, What can you do?
The robot has not told me anything about his treasure. When asked about the other robots, he simply says "...tic toc."

I have checked the walkthrough and it looks like I have done everything.

Why am I stuck?

Help?

Hello TinklePit.

Rodrigue speaks only about stuffs he has seen. But in a game, to see = to click.
So, did you see (= did you click) on the empty place in the little dome ?
And did you speak about the little robot's misdeeds to the big one (the cop robot) ?

Thank you, clicking on the empty pedistal did the trick.

Remember that rule (to see = to click) for the bimbos world, it will be useful.

Clicking on the empty piece did the trick for me also, everybody. Now I'm off to Dwarves World, where I need to find the last blue token. I now have seven out of eight tokens in my inventory. Thanks to ALL of you for your help.
I look forward to "giving back" to this forum and to others as well.
Sandy