They were first used by the Aborigines who lived in the outback Made out of a hard wood, if it is thrown just right it will return, come right back. When molded out of plastic it then takes on the shape of a playful toy Being a witness and unto all it's magic, children in amazement are now filled with joy. As for me, I make mine out of a three by seven inch prison commissary envelope. I throw with all my might- praying that you receive all my beautiful heart felt words that are written, that's all I hope. Envelopes soaring high and into the heavenly sky I want you to know, no longer will they ever have to take me again away and nor no longer will you ever have to cry. Thank you so much for filling me with your loving hope, owe it all to you-because, you threw back to me a love filled boomerang envelope.