Sawdust...

Took the kids and dog for the morning constitutional this morning through the park.  Was fun showing the kids how to use the transitions of the skatepark on their bikes.  Using the walls to gain speed using their weight and momentum through the curves.

After that, we started finding small piles of sawdust.  They were all over the park, very similar to this.  It's a wee mystery.  The tyre tracks here suggest some sort of motor vehicle transporting it in and dropping it but it's in odd places that doesn't sit with this theory.

I may have to make some further investigations.