A detective thinking deck built around a missing invention, inviting students to build, create and solve. Combines clues and logic with hands-on problem solving.

Case File: The Lost Invention is a fun, low-prep Grades 1–4 critical-thinking activity where students use clues, logic, and elimination to solve the mystery of a missing invention at the Bright Ideas Fair. Students determine where each inventor worked, which tool they used, and who ultimately found the lost invention.
Perfect for STEAM lessons, critical-thinking centres, early finishers, enrichment, library activities, or a whole-class challenge.
✨ Includes illustrated clues, detective logic grids, a solve-the-case page, and a complete answer key.