2. SYSTEMS TO STOP
TRANSPORTS
WITHOUT CONTROL
A SUBSTITUTE TO
CEMENT TO BUILD
BUILDINGS
A SYSTEM TO CLIMB
BUILDINGS TO
CLEAN THEM OR TO
STEAL
AN ELASTIC BED
FOR FIREMEN
A SPRING FOR A
BRIDGE
IDEAS BASED ON CREATIVE CHEWING GUM (ITS ELASTIC CONDITION)
CHEWING
GUM
ROPES