Construction activity kits comprised primarily of laser-cut and/or die cut wood pieces for making toy model marble machines; educational kits for building toy scale model marble machines for teaching physical science and engineering principles comprising die cut wood pieces, metal pins and carbon steel balls, and printed instructional materials provided therewith

'activ':2 'and/or':10 'ball':47 'build':24 'carbon':45 'compris':4,37 'construct':1 'cut':9,12,39 'die':11,38 'educ':21 'engin':35 'instruct':50 'kit':3,22 'laser':8 'laser-cut':7 'machin':20,29 'make':16 'marbl':19,28 'materi':51 'metal':42 'model':18,27 'physic':32 'piec':14,41 'pin':43 'primarili':5 'principl':36 'print':49 'provid':52 'scale':26 'scienc':33 'steel':46 'teach':31 'therewith':53 'toy':17,25 'wood':13,40

MARBLEOCITY

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