"This is hard." Good. Research shows that the brain is able to grow and change, and struggling supports brain growth. Struggling means to keep trying, to problem solve, to work at it, to put in effort. When kids say, "It's hard" we need to respond in a way that encourages them to keep at it, to persevere. We must let them know that things are going to be hard, and that's ok. Here are two brief videos that show why struggle is not only ok, it's good.
https://www.youtube.com/watch?v=WtKJrB5rOKs
https://www.youtube.com/watch?v=AWwDzHFSyLs
https://www.youtube.com/watch?v=WtKJrB5rOKs
https://www.youtube.com/watch?v=AWwDzHFSyLs