It's worth noting that the age requirements selected then were less about wisdom and experience, and more about residency in the US. The chief fear at the time was a European power manipulating the country to put a puppet in charge, so to avoid this they wanted to limit power to those who had resided in the US for a long time, but they also didn't want to preclude themselves from holding offices in the future. These numbers (35 for president, 30 for senator, and 25 for house representative) represent a compromise - note that the constitution's primary authors were 36 and 31 at the time it was signed, and the youngest signer was 26.