Ailsa’s travel theme this week is Energy (click here to see more entries). Back in September last year, I travelled to Austria for a week to visit family. One day, we caught the gondola up to Muttereralm, primarily to check out the mountain carting that is taking over as the popular sport during the summer months when there is no snow to ski on. However, there are lots of cool things to do and see on the mountain, including a series of waterwheels, sluices and other obstacles that the stream runs through on its way down the hill. I was there with my nephew and eldest niece, and they were both fascinated by the interactive elements that helped them learn about the power and movement of water. My nephew was a typical boy about it. He wanted to build up as much water as possible, and then see what happened when he let it go. My niece, on the other hand, takes after my dad (he’s a physicist). She naturally understands how things work, and methodically went along the machines one by one to confirm what she already knew. It was great fun to watch them explore.