Bart Simpson

bart_s_\(ts\), 1boy, child, blonde hair, spiked hair

Milhouse Van Houten

milhouse_\(ts\), child, blue hair, short hair,

For Two:

, 2boys, couple, child-to-child,
, bart_s_\(ts\), child, blonde hair,
, milhouse_\(ts\), 2boys, child, blue hair,

Negative prompt: size_difference, age_difference, height difference, father_and_son, father_and_child, brothers, worried, scared, yurie mouth, long_legs, large_legs, bad proportions, 3boys, pov, pov crotch, conjoined,