Yes, this is something people are lenient about: lying to children. Lying to children is not permissible; neither to adults nor to children.
Category: Truthfulness
Definitive proof against celebrating the birthday of the Prophet ﷺ
These are three important questions related to those who practice the innovation of celebrating the birthday of the Prophet ﷺ.
True essence of honesty
The true essence of honesty is that you remain truthful in a situation where nothing would save you except lying.
Whoever betrays a Believer
Beware of betraying a believer, for whoever betrays a believer has betrayed Allaah and His Messenger.
What is at-Tawakkul?
"What is at-Tawakkul (reliance)?" al-Hasan al-Basree said:
"It is that nothing in the servant's heart is more trustworthy than their Lord."
Revealing secrets
The corruption (ruin) of most matters stems from two traits: revealing secrets, and trusting those who are treacherous.
Beware of speaking ill of a believer!
...and whoever says about a believer something that is not true, he will be made by Allaah to dwell in the putrid fluid flowing from the inhabitants of Hell until he retracts what he said.
Gatherings are held in trust
The Prophet ﷺ said:
Gatherings are held in trust. Ahmad no.15090, Abu Daawood no.4869 – and al-Albaanee classified it as Hasan.
A tear of the Scholar
And the people of knowledge are well known; not everyone who has a certificate [becomes a scholar], [nor he who] has graduated from a [university] faculty or...not everyone who has memorised...
The story of the disbeliever who wanted to kill the Prophet ﷺ
Once, the Prophet ﷺ was returning home from a battle, and when they reached a [suitable] place, they stopped to rest.