In the yesterday, the paper lanterns was used candle for light but it is not safe for young children. Using the battery (electric power) is more safe for everyone.

The materials is low cost and circuit is as simple as possible. 2 bulbs be connected in parallel to 3V battery through switch. it is very very simple and easy.

You also connect more than 2 lanterns in row and column position, and light them in the night.

The components is following:

1x 2 cell battery box with switch.

2x 1.5V cell.

2x small bulb that is for torch.

Some electrical wire.

Taking your own risk.