A difficult opening case - checking kids for signs of puberty to b sure they're old enough to get married (and for divorce and chalitzah and a girl refusing marriage). Though why this age needs a formal check for marriage and so on, while the property transfer requires the age of 20... is an open question. Also, 2 mishnayot: Bequeathing via oral declaration, and the consequences of that being a deathbed declaration vs. the statement of a healthy person (where an oral statement doesn't work). Plus, how movable property is transferred together with land. Plus, the parallels of jewelry and thistles and a curse.