I know this has been done to death, but I still think it’s pretty cute.
Writing with a sparkler is pretty simple!
Again, use a tripod to keep the camera steady.
ISO 100 (or the lowest you can do)
and then you want a bulb setting. This means you can open the shutter for as long as you wish.. basically when you’ve finished writing.
If you want to have sparkler writing but you also want someone to be in the photograph, then all you need to do is add a flash to beginning of the previous method. Keep the bulb setting, but as you click, you will want your flash to go off, then keep the shutter open.
This will give you this;