At the local city hall just two blocks from the house, there was some event going on last week, which I can't remember what it was all about. Anyway, we went for lunch, on the way back home, we saw the event, so we went in.
There comes the postcard.
There was this booth used the recycled paper from used milk carton to make postcards. Let the kids experienced it. It didn't talke long. But, it didn't make the kids really understand the concept. Perhaps this is for primary school kids more than for kindergardeners.
Is this called filtering?
