...
Seems in the 60s while hippieness etc. - some children were given LSD.
With the "amazing" - but explainable result - that they didnīt think a lot of it.
Reporting life wasnīt really that different from how it usually was. Need a source for this - might find one, even.
Nope - I did some research and this is not, as I remembered it.

There were very young childrenīs case reports up to older kids - mostly anecdotal - but seems the very young kids (two cases of babies even) started screaming and being afraid of things - at least at the onset, while the older the children were - the more the similarities to what adults tend to report.

But no indifference or failing to recognize a vast difference to normal reality.
Ranging from intense bad trips to an 8-year-old girl expressing herself amazingly well and reporting transcendental/religious epiphany.

What is very interesting, though - while the initial above line of thinking seems not tenable at all - there have been studies done on autistic children and ones with very early onset schizophrenia with seemingly great success.

These are two old studies - logically they canīt be followed up nowadays, since it is a class 1 prohibited substance almost everywhere in the world - mainly due to commercial treaties with the USA, who force this classification on all partners.
So - you have to hold up doubts concerning these studies - not large groups - probably not properly done according to guidelines of drug-testing these days.

So I will refrain from linking up - and express the in my eyes justified reluctance to blindly accept any of it, until further confirmation (next millennium maybe..?).
Youīll find, if you look!