The Transportation Security Administration said replica grenades were confiscated this week at the Honolulu International Airport, according to the TSA Blog.
One was a replica grenade that is put on a vehicle's gearshift. The other was a ceramic replica grenade.
The TSA says any item that looks like a realistic grenade or bomb is prohibited on planes.
TSA officials say when these items are found at a checkpoint or in checked baggage, they can cause significant delays in screening.