Use your experimental skills to find out which substances will power a digital clock. Includes 1 digital clock w/ wires, 2 pots, connecting wire, transparent tape, copper & zinc strips & detailed instructions. Clock size: 2.5 x 1.25.
$48.99 $29.39
$27.99 $16.79
$15.00 $9.00
$60.00 $30.00
$15.00 $9.00
$26.00 $15.60
$52.99 $26.50