Use the common fruit jar and 3D printing to make a sand timer with this fun TinkerCAD project! This is a 10 min timer, and is great for taking test, visual cues, and as a calm-down method for anyone with Autism.
The lesson plan and instructions can be downloaded from my TeachersPayTeachers or Classful store!
If your staff needs Professional Development credit hours, please email stan@3dptco