1. Variables to be added
Power rating of the bulb should be made available to edit. This improves the real-life context of the circuit and is also useful if teachers were to use this applet to teach the concept of power.
2. Space Constrains
The workspace of the applet was rather small. It couldn’t accommodate more than 3 circuits within the same workspace. It would be good if the workspace could be make bigger, especially so if students were asked to compare brightness of bulbs in different circuits.