Holz Zum Selbermachen Mechanische Passwort Box Zahlenschloss Modell Wissenschaft Experiment Spielzeug
7,04 €
The red line is connected to the positive pole of the battery box. The blue wire is connected to the negative electrode of the battery box. What you buy is not only a family science toys, but also a kind of responsibility and attitude between parents and children in the new era.
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