Slug and snail obstacle course

I am a member of a photography group called Challenge Friday. Each week we are given a theme and challenged to take up to three photos on that theme. This week it was "obstacle".

I was checking how the peas were doing and, in view of the extremely wet weather forecast, I put down some crushed eggshells around the plants to deter the slugs and snails. I then realised I had created a mollusc obstacle course that, so far,  very few of the critters have managed to overcome. Long may it last. And it did provide me with the first of the photos for this week's challenge.