Name the things..

IZ and I was walking to NEX to meet friends (a fellow mother with her daughter), when I was suddenly inspired to play a word game.

I think it started when he asked me about shapes.

Suddenly, just like a light bulb, my brain went "ding!"

Me: Let's name things that are round.
IZ: ok!
Me: You can start first.
IZ: clock!
Me: hmm.. watch
IZ: signboard (pointing to the no left turn signboard)
Me: hmm.. coin?

Then he came out with: plates, traffic lights, egg yolk, etc

Wow, I nearly had brain freeze.. when I couldn't think of what's round anymore, I suggested to move to square..

Bad choice.