Tower Track – Free 3D extension for GraviTrax from the Masked Marble YouTube Channel Links to download the STL files: …
source
Check Also
REVIEW: GraviTrax Junior / My Planet Starter Set – Marble Run for Ages 3-7
This video review of GraviTrax Junior is loaded with Goodies & Freebies! Support my videos …
Wow!! 👍
Very Good!