Yeah definitely awesome stress relief for adults!

And FANTASTIC quiet play stuff. The problem with my ears means I can't spend time outside with dd while she is happily making lots of noise. I can't be right there up close. But lego we can do. Her imagination as she builds things or the running commentary while I'm building thins for her is at a noise level I can deal with more easily. She still gets excited and stuff, but at an "inside voice" level

I love building complex things. Find it very relaxing

There are lots of building instructions on the official lego site. E loves the more simple designs.