RPC Photos / Robert J. LucasAbove left, 5-year-old Bissan Obaid and 6-year-old Rebecca Chilinski, from left, play with oobleck, a substance used as a science aid to teach children about liquids and solids.The substance was shown to students at Riverview Elementary School's Science Night Jan. 18.Above right, Patricia Rossi, from the Summit Akron Solid Waste Management Authority, promotes recycling to students during Science Night.