This project is another example of a simple interactive learning resource which 10 - 12 year old children could code using their Scratch know-how and skills, for children from a year or two younger. Scratch offers great scope to pupils and students at a higher level coding a resource for kids at a lower level (the maths could be for 8-9 year old children; the code is by children 11+). Get more info from the PDF at https://scratch.mit.edu/readysteadycode.ie
https://scratch.mit.edu/projects/171571632