In a sneak peek at Tuesday's Jill & Jessa: Counting On, Jessa (Duggar) Seewald and her husband Ben prepare their 5-month-old son for a journey to Central America, where he'll meet his cousin Israel, 1, for the first time.
The new parents – who could probably use some help from the Duggars' most organized sibling (Jill herself!) – go down the list of all the day-to-day necessities baby Spurgeon will need, including bug spray, sunscreen, wipes and diapers.
Hilariously, it's a bit of an eye-opener for Ben, 20, who is still learning as he goes about exactly how many diapers his son goes through each day (he estimates the tally at three to four, while Jessa reveals it's more like seven).
The trip also marks the first time Jessa, 23, will reunite with big sister Jill (Duggar) Dillard, 24, since Jill and husband Derick began work on an extended in Central America.
Along with the Seewalds, several Duggar siblings are heading down to visit the Dillards, who revealed that their little guy is "learning something new every day" – including long-held Duggar family favorite traditions! – during their time abroad.
Jill & Jessa: Counting On airs Tuesdays (9 p.m. ET) on TLC.