I popped into Lidl whilst out this afternoon - I like to see if there's anything I can use for craft. I bought a woodburning tool for £8.99 - it was too good a bargain, for me anyway especially as I'd been wanting something like this. It says it's for use on leather, wood and cork; but some manufacturers don't know us crafters LOL. I've used it here on Grungeboard, but also tried it on wood, cotton fabric, paper and card; it works on them all. If you get one but have never used one before and maybe try cutting out stencils from plastic milk bottles for example - I only mention the milk bottles as a way of recycling ;-) you can clean it with steel wool. Obviously being cheap it may not be as robust as a more expensive one but I think I'll get my money's worth out of it.
xx Edited The bottom pic shows the fancy tips stamped onto Grungeboard, as you can see there are 7 of them and there are 7 writing/drawing tips