Optional parental preparation:

1. Note 1 – Tar•gumꞋ Pseudo-Yo•nâ•tânꞋ specifies (bᵊ-Reish•itꞋ 25.1) that ואוסיף אברהם ונסיב איתא ושמא קטורה היא הגר דקטירא ליה מן שירויא (Qᵊturâh, meaning "bound" in Aramaic, is one and the same as Hâ•gârꞋ, who was already bound to Avᵊrâ•hâmꞋ in marriage). 
2. Note 3 – Proposed locations of ancient Kha•vil•âhꞋ, associated with Gan EiꞋdën, are, literally, all over the map. Some scholars locate Kha•vil•âhꞋ in southeast Mesopotamia at the northern tip of the Persian Gulf. Others on the east side of the Red Sea in the Arabian peninsula and Yemen. But the land described as known for its fine gold deposits, famed in the ancient Middle East, was Punt, south of Egypt (now Ethiopia). Further, the Arabian peninsula going Syria-ward branching northeast does not lead to Shur and, thus, must be eliminated. 
3. Note 4 – Contrary to simplistic fablizing, the average lifespan in this era was under 30 years. Simply assuming lunar years and converting to solar years would yield a lifespan for Yi•shᵊm•â•eilꞋ of just under 12 years old; not nearly enough to sire 12 sons even though, in ancient times, 12 years old was regarded as the threshhold marriageable age. 137 solar years would require that Yi•shᵊm•â•eilꞋ lived more than 4½ normal lifespans — fablizing. However, the theory of some scholars that a "century" was sometimes added as an acknowledgment of great respect would suggest 37 solar years plus an honorary century. And 37 years old was 7 years beyond the usual lifespan, very old for that era but not beyond reason and seems to corroborate this hypothesis, as it also allows the siring of 12 sons (plus however many unmentioned daughters). 

Questions you might anticipate that your child might raise and be prepared to discuss:

1. Note 2 – How could Avᵊrâ•hâmꞋ live 175 years? This answer is not so simple. But these events occurred during the transition from lunar to solar calendars, when "years" were lunar (a month today) and changing to solar years that we know today. It seems likely that Avᵊrâ•hâmꞋ's years were calculated partially in the solar calendar (e.g., perhaps 75 solar years like we know today) with a "century of respect" added in to elevate him more to the company of earlier persons of note whose ages were expressed in lunar "years" (months). Thus, simplistic assumptions aside, determining the life spans of ancient peoples is more guesswork than science. During the transition from lunar to solar calendar, some scholars also suggest that persons of note were "awarded" great ages to match their achievements, perhaps while trimming their ages toward the solar calendar. If, for example, the 75 refers to his age in solar years (plus a century awarded out of respect), that would equate to 900 lunar years (i.e., months), plus the century awarded out of respect. Mᵊtu•shë•Ꞌlakh lived only a bit longer, to 969 (lunar) "years" — a bit short of 80 solar years on modern calendars.