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k'nex marble machine 2013by www139
The Element a k'nex ball machineby www139
"AUTOMATED" k'nex ball machine elementsby www139
Andromeda K'nex ball machineby 15knexLaz
k'nex ball machine preview "with video and link"by www139
k'nex ball machine preview "with video and link to video"by www139
knex ball machineby www139
Connected Arm Lift, Sandroknexmaster's knex lift.by knex dude 2000
k'nex ball machine Coolcreation (built by a 7 year old)by www139
Evolution Knex Ball Machineby collinjo12
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