I remember that stuff....can actually almost taste it now that im remembering it.... wow, just think we used to play with that surrounded by lead painted walls with asbestos cielings....lol.....hmmmm, explains a lot about me I think.....of course that was before graduating on to other brain killing substances of the teen years.....lol
We threw pencils and wet paper and anything else into the ceiling at school. There was an area of the ceiling in the boy's toilets that was just a giant mass, like a stalactite of stuff hanging down and random pencils and pens were a given!