The Teacher’s Manuals (and also the Cosmic Calculator course) were written to provide syllabuses for different age ranges. These are carefully structured to that end. The worksheets given out at the end of this course will also provide useful structures.
Pebble maths is certainly for younger children and offers an excellent introduction to Vedic maths. It fits in perfectly with the material given here.
For young children it is important that they approach maths as games.