Εργαστηριακό μικροσκόπιο και δοκιμαστικοί σωλήνες. Το πείραμα χημείας. Επιστροφή στο σχολείο και ευτυχισμένη στιγμή. Χαρούμενο χαμογελαστό αγοράκι που διασκεδάζει στον μπλε τοίχο. - Φωτογραφίες & Εικόνες Αρχείου

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