Liberty,
MO,
United States
Beth’s Academy Second Grade Cardboard Challenge
Taipei,
Taipei,
Taiwan
De Kalb ISD Cardboard Challenge
De Kalb,
Texas,
United States
RBHS Library Cardboard Challenge
San Diego,
CA,
United States
SAC Cardboard Challenge
Adelaide,
SA,
Australia
Valle del Miro Cardboard Challenge
Valdemoro,
Madrid,
Spain
Carbrook State School
Carbrook,
QLD,
Australia
The Branch School Cardboard Extravaganza
Houston,
Texas,
United States
Unboxed: Adventures in Cardboard
Bridgewater,
NJ,
United States
Cardboard City
Guernsey,
United Kingdom
