Thanks all,
He too is obsessed by infinity. It took him lots of experiments to "see" infinity. One day, about six months ago I was upstairs and heard a crash. Downstairs ds is on the sofa with a mirror in his hand shining it into the mirror on the wall behind a sofa. "look mummy. That's infinity."
He is very much a "flash of brilliance child. Now and then.
We have tantrums at roundabouts when I turn off as he is counting things. He also seems to be grasping multiplication all by himself. I let him lead and I follow.
