The circuits are built into large wood boards that mount easily onto an easel. The boards are labeled using conventional symbolism. Bulbs and batteries are easily removable--just be careful not to burn your fingers on the hot bulbs!
Parallel vs Series Circuit
Which bulb will be brightest in each circuit?
What will the current meter show for 4 identical bulbs? 3 bulbs?
What happens to the bulbs when we short one out?
Series vs Parallel Circuit
Compare the currents through the bulbs by observing their relative brightnesses.
What happens when you connect the same terminals of a pair of batteries? Classic Kirchoff's rules puzzler.