With a BIG Traffic Light even the youngest of drivers can have lots of fun learning how traffic lights work.  These sturdy traffic lights automatically change from red to green in a 30-second sequence.  The lights are assembled in no time at all. Three AA batteries are required for operation (batteries not included). And the base can be filled with water or sand to increase stability.  What's more, if those little drivers forget to switch off the lights once playtime has finished, then the power supply will automatically switch off after an hour to save energy. 71cm high