«Веселая наука» (изготовление калейдоскопа) Мурашкина С.В.
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![[Веселая Наука] Химические Эксперименты - ВидеоЖара 2018](https://sun9-2.userapi.com/c846523/v846523931/75cee/OEQ6Bfs4KLo.jpg)
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