Sketch Up
Youtube Tutorials
https://www.youtube.com/watch?v=qgt2s9RzvKM
https://www.youtube.com/watch?v=xsteCTxxg1Y
https://www.youtube.com/c/Thesketchupessentials
https://blog.sketchup.com/youtube-all-videos/playground-design-advanced
TinkerCAD
Youtube Tutorials
https://www.youtube.com/watch?v=gOs6Mdj7y_4
https://www.youtube.com/watch?v=ZvDkf1CEpMY
https://www.youtube.com/watch?v=azaL51fSe2I
(playground)
https://www.youtube.com/watch?v=HoiXywWNqLM
(this video’s channel has many other playground equipment tutorials)
FreeCAD
Youtube Tutorials
https://www.youtube.com/watch?v=uh5aN_Di8J0&list=PLP1rv37BojTd5NY3E_aqOWUe0uA8J-J1T
(playlist, lengthier vids)
https://youtube.com/playlist?list=PLboXykqtm8dyLud3GJs914iZuU-L-o_1W
(playlist, collection of short vids)
https://youtu.be/t8wCsyqvoxY
(6 min vid, a little shaky but to the point)