What is the most important money lesson to teach kids?

What is the most important money lesson to teach kids?
Saving money
40% (2 votes)
What things cost
20% (1 vote)
Earning money
0% (0 votes)
Budgeting
20% (1 vote)
The value of coins and bills
20% (1 vote)
Other
0% (0 votes)
Total votes: 5