Try Snap as well. It's like Scratch and has the same learning curve, but has more features (functions, 2D arrays, hashmaps, local variables, recursion, string manipulation, etc.) that make it more suitable than Scratch for more advanced computer science concepts if the student wants to speed ahead. It could be used all the way from elementary school through high school without running into serious limitations, if an instructor wanted to.

https://snap.berkeley.edu/snap/help/SnapManual.pdf