The Mystery of the Plastic Rings (The Green World)  (English, Paperback, Mehta Sonia)

A series of story-cum-activity books for children that aim to teach environmental awareness early on Pebbles finds some plastic rings buried in his garden. He has no idea what they are or where they've come from. When Pebbles and the Econuts get together to figure it out, they stumble on something very scary. What do they discover and what do they do about it? Read on to find out.