How to make Marble Run with escalator out of cardboard

Marble Run with escalator from Cardboard own hands
Science Projects | Escalator Working Model
Marble Run with escalator from Cardboard own hands How to make Marble Run from Cardboard MARBLE RUN
Materials:
cardboard, hot glue, wooden skewers,, marbles balls.
#Scienceprojects #Escalatormodel #Workingmodel

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