WATCHES ARE QUITE simple in principle. They need an oscillator, a display and a power source. Horophiles get very excited indeed about oscillators such as free-sprung balances, tuning forks and quartz

Got a project you want to show, a poem you have written, or a science adventure you went on? This is your space to share it.

■ Makes 16 ■ Prep 1 hr plus cooling and 10 mins chilling ■ Cook 12 mins 100g unsalted butter, softened175g caster sugar, plus extrafor sprinkling1 egg1 tsp vanilla paste200g plain flour, plus extrafor

Recycle your rubbish to feed garden wildlife

Make your own Valentine’s candle for a loved one or yourself with our simple guide

Forge the explosive strength you never knew you wanted (while still packing on muscle) with a hybrid training plan built on new science.