marble run frame (stem)

made for stem/steam/stream marble run structure. this is just a frame the pegs are there to help with connecting paper tracks. again THIS IS JUST THE FRAME. each level is around 184cm. each file contains enough of its specific part to make one level. in the file are 8 connectors in the other file are four poles lastly the other file has four poles with pegs (i recommend you use this one instead.