Patrick Maughan, 53, and Owen Maughan, 27, both from Darenth, will appear at Sevenoaks Magistrates’ Court later on Wednesday.
Two pickup trucks collided in New Barn Road, Dartford, just before 9.30pm on Sunday.
Three people were treated in hospital including the boy, a one-year-old girl, and a 24-year-old man who remains in a critical condition.
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Patrick and Owen Maughan are also charged with grievous bodily harm with intent and attempted wounding with intent.
Kent Police is continuing to appeal for information about the crash that involved two grey Ford Rangers.
