Vancouver,
BC,
Canada
Genius Kids’ Cardboard Challenge
Lansing,
Michigan,
United States
Cardboard Challenge at Olympia Brown Elementary School
RACINE,
Wisconsin,
United States
D-na day
Leuven,
vlaams-brabant,
Belgium
B105 Cardboard Challenge
Waipahu,
Hawaii,
United States
Cardboard Challenge Sierra Leone
Freetown,
Other,
Sierra Leone
Ian LaFarge
Aurora,
CO,
United States
Ubunifu initiative
Nairobi,
Kenya/Nairobi/Githurai,
Kenya
Camp Fire After-school Cardboard Challenge
Pensacola,
FL,
United States
2019 KJHS-Oakdale Cardboard Challenge
Normal,
Illinois (IL),
United States
