Quick, simple question.

Is there a trick to finding the blown bulb on a string of christmas/fairy lights?

My kids are now at an age where christmas is exciting and I must say this is the first christmas in a few years where I feel excited too. However, this means they are also getting excited about seeing all the lights and decos.

I've put up one waterfall style (not very long but still a lot of bulbs) and a long string of fairly lights. Both style have lights not working. I was working my why through each indivisual bulb when I thought about asking the seabreeze brain trust.

Thanks in advance