On the chasing arrows of the recycling symbol, he wrote the words Paper, Can and Plastic. Beside each chasing arrow he drew an item that you can recycle (Paper - a piece of paper with a picture of the sun, Can - an opened can, Plastic - a water/H2O plastic bottle).
I have been encouraging my son to recycle and I have seen him doing this. For example, he segregates paper that he used for his activities and tells me to put them in the recycling bin. He also likes drinking chocolate milk from fast food places and he does not want to throw the bottles on the trash bin. Instead, he brings them home and tells me to include them also in the recycling bin.
In case you want to see some of my son's drawings (taking my chance here to promote his site), you can visit DK Books and Other Stuff!
Have a nice day!!!!