Hywel, I notice the blurb says "in line with the new National Curriculum" is that a USA-wide curriculum or is it in another country. I've got kids in that age range in the UK and they don't do any such computing/coding [at school!].
Yeah, the UK National Curriculum says children need to learn a visual language (like Scratch) and then a text based one (like Python). Your kids should be doing visual coding in school from Key Stage 2.
In case anyone else was wondering, "Key Stage 2 is the legal term for the four years of schooling in maintained schools in England and Wales normally known as Year 3, Year 4, Year 5 and Year 6, when the pupils are aged between 7 and 11."