Brad Litwin makes these striking mechanical cards and sells them for $45 assembled and $35 for a kit. You open them up and turn a cool little crank to get them started. There are various styles including the Radial Engine and the Ambigulator.
Brad Litwin makes these striking mechanical cards and sells them for $45 assembled and $35 for a kit. You open them up and turn a cool little crank to get them started. There are various styles including the Radial Engine and the Ambigulator.