Correlation between naughtiness and tall healthy plants???

In a nutshell, the boy likes drawing, not just confining his Mondrian creations to just A4, some days it’s the wall, every so often the carpet, and occasionally my handbag or the furniture. I have now taken to routine confiscation of the offending pencil / pen. The courgette saplings benefit greatly as I use the confiscated article as a stake. The naughtier the boy the healthier my crop. Bring it on!