Light bulb and current limiting resistor
Your light bulbs are specified as 1.5v, 0.3A. This means their resistance when hot is 5ohms (1.5/0.3). When cold, the resistance will be around 1/10th of that, say less than 1ohm.

Comparing 1kohm to 1ohm, you can see that essentially all of your battery voltage will be dropped across the 1k resistors, with very little across the bulbs.

To put it another way, a bulb needs at least half its rated current in order to glow visibly, so 150mA for those bulbs. With 4.5v available, 1k resistors limit the current to a few mA, not enough to have a visible effect on the bulb.

To get 150mA with 4.5v, use resistors no larger than 4.5/0.15 = 30 ohms. Also make sure your power source can supply that current.

OTOH, LEDs might be better as they light with much lower currents. OTOH, LEDs are always the same colour, and it can be difficult to perceive even as much as a 2x difference in brightness as a result of current. A filament bulb, especially when being run well below its rating, changes colour as well as brightness, and will be much better indicator for differences in supply current.