Matching Pairs InventionsOnline version Based on the unit 7 Good Idea! of the book Our world 4! by Claudia Casanova 1 Idea 2 Imagination 3 Creativity 4 Try 5 A solution 6 Invent 7 Useful 8 A Wheel 9 Invention 10 Succed 11 Fail 12 Battery 13 Electricity 14 A problem