amazing electricity with cosmin

Today M3 and the year 5s of M1 went with Cosmin to a power station. There was a a lot he told us about and he made a generator out of a CD and I thought was really cool😎 . We were walking for like 40 minutes there and back so that's 80 minutes and he was telling us about it and on the fence it it said  11000 volts in the power station. Walking was the only boring part of it and it made me sweat a lot and tired 😴   One thing I learnt was that the substation in the picture lowers the voltage of the electricity so it safe to power your house.