A circuit that can be added to any toy vehicle for your kids, just for fun.
It is powered by a 9v battery and has four switches : one for left turn signal, one for right turn signal, one for position/taillight and one for headlight. These can only be lit when the position/taillight is on.
The turn signals flash, of course, but it takes some time to start the flashing (the capacitors needs some charging). And they need to be deactivated manually.
I've designed it to use with 8mm leds (80mA). Using other leds will need some adjustment of the resistors and/or capacitors.