ESV: that this may be a sign among you. When your children ask in time to come, ‘What do those stones mean to you?’
NIV: to serve as a sign among you. In the future, when your children ask you, ‘What do these stones mean?’
NASB: This shall be a sign among you; when your children ask later, saying, ‘What do these stones mean to you?’
CSB: so that this will be a sign among you. In the future, when your children ask you, ‘What do these stones mean to you?’
NLT: We will use these stones to build a memorial. In the future your children will ask you, ‘What do these stones mean?’
KJV: That this may be a sign among you, that when your children ask their fathers in time to come, saying, What mean ye by these stones?
NKJV: that this may be a sign among you when your children ask in time to come, saying, ‘What do these stones mean to you?’