The incident happened at about 7:20am as a group of five National Health Service workers were running in tandem through the city.
Two boys dressed in black managed to avoid security and attempted to grab the torch, ITV footage showed.
Fortunately the torchbearer managed to wrestle it back and the children were ushered away by police.
Police said the relay was not affected by the youngsters' ambush but warned of the dangers of running into the path of the torch and its convoy.
A Metropolitan Police spokesman said: "At approximately 0730hrs in Coventry, two children entered the security bubble around the torchbearer and were moved by the torch security team.
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