They’re either very young adults or in their teens.
Do Chip and Joanna Gaines' older kids resent Crew Gaines?
Stephanie Wijkstrom cautioned that parents could accidentally breed resentment between their kids.

The veteran therapist asserted that communication and family bonding were the best ways to avoid a one-sided sibling rivalry.
Luckily, Chip and Joanna Gaines' older kids show no signs of jealousy towards Crew.
In fact, Joanna claimed their siblings couldn’t get enough of each other.

“They still are completely obsessed with this kid,” she said in an interview withPeople.
“They just say, ‘Can I do this?’
‘Of course.'”