I interested my daughters at an early age in "doing things around the house". When my wife said that it meant cleaning and laundry but when I said it they knew we were going to build something! We did this enough that they gained a lot of confidence over the years and now they are not afraid to tackle anything. When they were eight and eleven years old they decided they wanted a pool in the back yard. I told them that if they did the digging I would help them build the pool.
They dug a hole 3 feet deep (one meter) by 15 feet long and nine feet wide, all by themselves!
My wife helped and the four of us built this little plunge pool, using left over bits of tile and slate
to finish it off. This created memories I will never forget and how proud I was when they invited their friends over to the pool they built! And another nice thing! my daughters are grown and gone now but I still have the pool!