Name that element
Can anyone thing of puzzle elements that start with the following letters?
B, G, O, P, R, T
I will add the items you come up with to this list. So far I have:
B - light Bridges, discouragement Beam (laser)
G - deadly Goo, Glass
O - Overgrown observation
P - PUNT cube, Propulsion gel, Portal (Auto), high energy Pellet
R - Repulsion gel, Rotating panels, laser Redirection
T - Turrets
Portal2Tenacious:
B - Buttons, Bumbleball, Bombs, Bottomless Pits.
G - Grate, Gel, Emancipation Grill.
O - Orange Gel..? I don't know
P - Faith Plate, Panels, Pneumatic Diversity Vents, Portals!!!
R - Laser Relay.
T - Um... Timer? Another hard one.
EDIT: Thank you for the ideas. Please keep them coming.
EDIT2: The first room is complete. I used PUNT cube, Pneumatic diversity vent, faith Plate, Portal (auto), and Panels. Thank you to the people who inspired this room. I intend to keep adding ideas as they come in.
There's Propulsion gel... and, uh... Glass. Which isn't really known for its interactivity.
added
B - Buttons, Bumbleball, Bombs, Bottomless Pits.
G - Grate, Gel, Emancipation Grill.
O - Orange Gel..? I don't know
P - Faith Plate, Panels, Pneumatic Diversity Vents, Portals!!!
R - Laser Relay.
T - Um... Timer? Another hard one.
G - Grate, Gel, Emancipation Grill.
O - Orange Gel..? I don't know
P - Faith Plate, Panels, Pneumatic Diversity Vents, Portals!!!
R - Laser Relay.
T - Um... Timer? Another hard one.
Wow! Thanks! That's a lot more input than I expected so I appreciate it.
Interesting, those are all the letters in your username. 
Bridges, Bombs, Buttons, Beams
Gel droppers, Green fields (FourthReaper's SDFs or my Physics Shields)
Orange portals
Portals, Paint
Rotating panels, Red fields
Tractor beams, Timed buttons, Turrets
only got a few so far, but here's some things.
Button activated catapults
Gravity fields, gravity gun
(None)
Perspective changing (wall climbing)
Rotating rooms
Test chamber doors
Aperture Science: We do our science asbestos we can!
BEE mod logic 
Gravity changes
Observation room
Puzzles ;D Pneumatic diversity vents, pumping station
Rotating panels, redireection cube, reflection gel, rattman den
Tractor beams
I have started a spreadsheet of all the ideas and I will post the ones I like in the OP above. Thank you for all the ideas so far and keep them coming.