Introduce some wobbly seating: the Tumbly

I really like the fun look of this Dutch stool, the Tumbly. But there's more to it than just looks. Because it requires a constant readjustment of your posture, like an exercise ball, it confers great benefits on your back. As someone who spends most of the working day sitting at the desk, I could go for that - plus it would amuse me to see everyone in our open-plan office wobbling away.

It comes in a smaller size, too, so you could get your kids sitting up straight from an early age (they do it naturally, but there must come an age were, like me, they start to fall into bad habits). Bright candy colours and even a glow in the dark option will certainly appeal.