A child presses close to the glass tank, an expression of wonder on his face.   Inside the tank three frogs hang suspended in the water, motionless.  Their webbed hands and feet splayed and held askance.  The child bangs the glass with his hand, willing them to move.  “Don’t tap on the glass!” his harried mother intones.  The stillness of the animals within their tank contrasts starkly with the swirl of activity just beyond.