The Science Mine, 36 E. Granite St., will be open 10:00 am to 2:00 pm on Saturday. Sink or Float? Come have fun while learning about density and buoyant force. Enjoy new exhibits - the telephone switch - and good old favorites including Tesla coils, stream tables, wave pendulum, and more. Non-member admission is $5 per person; $15 per family, or renew your membership for the season.