Boomerang enthusiast Joe Lankalis will offer a brief lecture on the history and use of boomerangs at 6 p.m. on July 31 at the Carbon County Environmental Education Center. He will also demonstrate throwing techniques.

Attendees will test their own throwing and catching skills with custom-made "rangs" and take home an indoor "Roomerang."Registration is required. A donation is requested.CCEEC is located at the west end of Mauch Chunk Lake Park in Summit Hill. For directions or to register, call (570) 645-8597.