Here is a basic assignment that along with instruction will take kids 2 weeks. Blender is the software. Model and animate an object moving. They follow along with the ice cream cone and then animate something of their own. I've made a series of videos going over the assignment that students can follow - each video is 30s-2 minutes - attempting to chunk the larger task into basic skills.

I'd go over first 3 videos together without introducing assignment. Stop there and have kids play with software for rest of that day, creating whatever they want to.  Next class give them the task.

https://www.youtube.com/watch?v=3tbXI9Ll-6M&authuser=0 - Blender navigation basics

https://www.youtube.com/watch?v=-2Cq_9-omJ0&authuser=0 - Adding Meshes (cone and sphere)

https://www.youtube.com/watch?v=yNspUItDOco&authuser=0 - Basic Transformations (model an ice cream cone out of the primitive shapes)

https://www.youtube.com/watch?v=pd65PS1y4SE&authuser=0 - Adding Colours & how to actually see them

https://www.youtube.com/watch?v=KI-_R0d_Lpg&authuser=0 - Animate motion with keyframes (make the cone move)

https://www.youtube.com/watch?v=rpCCDQEz0pc&authuser=0  - Adding a light to the scene

https://www.youtube.com/watch?v=gphY1jf812Q&authuser=0 - Adding & positioning camera

https://www.youtube.com/watch?v=lMYrVhmidug&authuser=0 - Render & Output Settings (actually turn your project into a video) (longest video - 4 minutes)