Johnny and the Bomb(2006)

Johnny and the Bomb is a children's adventure series following Johnny Maxwell, who discovers a time machine while helping an elderly woman. His trips back to 1941 accidentally trigger a chain of historical events that threaten to unravel the present. Realizing his own existence hangs in the balance, Johnny and his friends must race through time to undo the damage and restore history to its proper course. The series blends comedy with genuine stakes as the young protagonists grapple with the consequences of tampering with the past, learning that even small actions can reshape the world around them.