00635naa#a2200169#i#450# EN\INFRA-M\bibl\122538 20260519005150.2 2306-1731 20260331b2026####ek#y0engy0150####ca RU The Motivational and Value Criterion in the Development of Musical-Creative Abilities of Primary School Students by Means of Sand Animation (Experimental Results) Journal article Moscow INFRA-M Academic Publishing LLC. 2026 11 с. Journal article local Начальное образование. 372.4 Levchenkov V. V. naukaru.ru