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