Beginner learners (6-7 years old): Choose from prepared “problem cards.” Draw simple pictures with 1–2 features. Use sentence starters.
Advanced learners (8-9 years old): Create detailed mechanisms or multi-step solutions. Add diagrams, labels, and written descriptions. Present to the class.
Expert learners (9-10 years old): Address community or environmental issues. Create 3D prototypes. Write persuasive or reflective texts about the invention.
