Nadya Suleman, aka Octomom, had the most kids in one birth to survive. Her octuplets, six boys and two girls, were born in 2009. Babies can smell what you smell while in the womb, but won't be able to taste salt until around 4 months old. The cost of raising a child from birth to age 18 is around $233,610. In the 1920s, parents were discouraged from cuddling their kids, which is why those old-timey photos show kids in oversized shoes and baskets instead of Mom's lap. In some European countries, it's common practice to let little kids stay up until 10 p.m. -- which might just ruin your night. Kids' brains experience the most dramatic growth from birth until five years old. If their bodies developed at the same rate, a one-month-old baby would weigh 170 pounds!