Did they each take 3 hits (6 total)? That would be a lot of acid for an adult, much less a kid.
I used to get queasy to my stomach. Three hits might well have made me sick. At the time, people would talk about an additive in the acid, but I’ve forgotten what it was now.
It’s not a drug for little kids.
Who knows how much is in a “hit?” DEA has reported a range of doses in confiscated LSD blotter and tabs. It can range from 10 ug per square to 100 for blotter, and 40 to 400 ug in tabs. Since 1990 the lower doses are more common, because of the club scene ( a 50 ug trip in a club is much easier to handle than a 500 ug ego death trip).
More modern dosing actually reverts back to 1963, with dealers having “acid” ( or DOB, 25i, or who knows) dissolved in vodka and customers getting it on sugar cubes or dropped directly on the tongue, again with who knows what dose per drop.
Lots of “acid” these days is 25i, or 2-(4-iodo-2,5-dimethoxyphenyl)-N-[(2-methoxyphenyl)methyl]ethanamine, which is readily available online. It’s much more available than LSD, which took a huge nosedive when Picard and Apperson got busted making kilogram batches of pretty pure LSD.