In spite of learning Logo at 6, I didn’t try to introduce programming to my kids, but my 7yo daughter picked up Scratch-based web programming during school where they did Hour of Code. (Pleasantly surprised considering Texas’ slow bleeding of public schools.) It’s a free site filled with focused, guided activities using block programming and probably other languages. One is Dance Party where you sequence dancers and their stage to a music track, and in another you teach Elsa to skate patterns into the ice in a modern twist on Logo.

They do a lot of Minecraft now but are interested in TinkerCAD, which I’ll solidify by printing some of their designs. Not sure any of the beginner CAD apps are really easy, though.