The Kids Next Door

They race, they race,
Like meteors launched from a cavernous place;
Across the lawn, across the street--
No one else here has fleeter feet!
Here comes the bus. With seconds to spare,
They fall into line as they leap through the air.
Two vessels of untapped energy,
They tremble with unexpressed synergy,
And should they ever combine their potentials,
I fear that the blast may exceed exponentials.