In Scheme, you can just teach parentheses since it is homoiconic. Scheme can be taught visually, and it possible to use turtles, like in LOGO. http://picturingprograms.com/ An alternative to SICP is How to Design Programs, htdp.org, of which the above Picturing Programs is a more basic version of the same content. For an alternative, there is Clojure. Then again there Smalltalk, a language that also sprang forth from Piaget's theories on learning, just like LOGO. Pharo is a modern version of that: pharo.org Also, there is UCB LOGO: https://people.eecs.berkeley.e... * There, I have done my Mitzvah for the day.*

Give me a test that can be done to show that the requirements of falsifiability in science can be falsified. You can't. Therefore, the current view of science is self-contradictory. Karl Popper and the so-called scientific establishment are working within a framework of absurdity.