Final answer:
The condensed sentence does capture the main idea of teaching children to look before crossing the street, although it omits some details about traffic conditions.
Step-by-step explanation:
The condensed sentence "Children from a young age must look for cars before crossing streets" does capture the main idea of the full sentence, which is the importance of teaching children the safety habit of looking both ways before crossing the street, regardless of traffic conditions. Both sentences convey that this is an essential lesson for children. The condensation process has omitted specific details, such as the necessity of this practice whether traffic is heavy or not, but the core message remains intact.