Consecutive octaves or fifths in good harmony
Ought not to be used lest ears they many harm any.
If F goes to G,
Don't move C to D,
Or else it will result in disharmony.)
or counterpoint or the overtone series, or "the great composers", Slonimsky goes far beyond to building melodies from permutations of tones, or imbedding words into notes, or taking melodic contours from the outlines of things, like a skyline, or the Slonimsky family at breakfast, as was done here by Heitor Villa-Lobos:
In many of the bits of music here, intended for his young readers to try at home, you can find the genesis of some of Slonimsky's famous Minitudes.
Another childrens' book on my shelf is Marian E. Baer's SOUND: An Experiment Book, of which I've got the third printing, dated 1952. The book is just a collection of small experiments, using everday objects, some of which approach approach Alvin Lucier's music in their ears-wide-open elegance:
(C.f. Lucier: Music for Piano with Amplified Sonorous Vessels).