"What have you been learning?" Jessa, 23, coos in an Instagram video posted late Wednesday as her son smiles and babbles – or as the new mom proudly put it, "showing off all his new vocabulary skills."
In this week's issue of PEOPLE, Jessa opens up about the parenting advice she got from mom Michelle Duggar.
"She has raised just about every personality type, so I really enjoy learning from her," Jessa says. "But my baby is really still young, so most of my questions these days are about breastfeeding and when to change diaper sizes."
The Jill and Jessa: Counting On reality star and husband Ben Seewald commemorated Spurgeon's 4-month birthday on with a trip to an ice cream shop.
And her sister Jill (Duggar) Dillard wished husband Derick Dillard a happy 27th birthday with a kissing selfie Wednesday.
Since I'm on wifi today...I wanna say happy birthday to the most amazing man in the whole world, my hubby! I love you more than you know @derickdillard You are so caring and thoughtful and an amazing dad! Thank you for the late night talks, a shoulder to cry on, painting my nails, and helping with the little things like late night diaper changes, dishes and laundry at just the right times! I love watching Israel's face light up when he sees you and watching the way you interact with him. He loves playing fútbol with his papa! You're my knight in shining armor and the of my life! I'm blessed beyond measure! I love you and Israel does too! I pray every year you'll be closer to Jesus than the year before! #HappyBirthday #lovemyhubby #celebrateonedayearly #honeymoonpic
For more on the Duggars' lives these days, pick up this week's issue of PEOPLE, on newsstands Friday
PEOPLE has confirmed that Josh, 28, is back home in Arkansas after a seven-month stay at the faith-based Reformers Unanimous in Rockford, Illinois, where he checked in last summer following his confession to harboring a porn addiction and cheating on his wife Anna Duggar.
Counting On premieres Tuesday at 9 p.m. ET on TLC.