His contract is technically legal by certain states considering the acceptable age group to get a job is 14, according to state laws. There are chances Ahmed could have ran into a scam, though, as this is a common issue today. Such as the chance it was just a false ad, or maybe a money scam.
Although the Constitution has specific rules you can find in it, many Amendments have been added or deleted over time. One example of an amendment added to the Constitution is the 19th Amendment passed in 1920 that allowed women the right to vote. Also, the 13th Amendment abolished slavery in 1865.