some such. This is the sort of thing:
http://www.amazon.com/Toshiba-PA3610U-1ETC-Keyboard-Protector-13-3/dp/B000V3JVE2It may be necessary to match the model correctly, since different models might have different keyboards
I have a nice looking desktop keyboard that simply can't be disassembled. A key stuck on it once: I figure some bit of crud fell in the crack beside the key. I shook it upside down: the key stopped sticking; then I bought a silicon protector to keep anything else from falling in
If you shake your laptop upside down, I'd hold it firmly with both hands in such a way that the screen wouldn't move while you were shaking it: you don't want to have a hinge break while you're shaking the thing. Another thing you might try is shaking the keyboard upright, vacuuming it; rinse and repeat several times; be prepared for the slight possibility that you could suck a key into the vacuum cleaner; maybe its better to start with a clean fresh bag so you won't be searching for your lost key(s) in a mountain of dust, carpetfibre, or cat dander
I WILL NOT VOUCH FOR THE FOLLOWING INSTRUCTIONS. YOU SHOULD PROBABLY SEARCH THE TOSHIBA WEBSITE TO SEE IF YOU CAN VERIFY THIS DESCRIPTION THERE BEFORE TRYING ANYTHING LIKE THIS. LOTS OF KEYBOARD KEYS MAY COME OFF IN THIS MANNER BUT I DO NOT KNOW FOR SURE THAT THEY ALL DO. IF THIS DESCRIPTION IS CORRECT, THE KEYTOP SITS ON A STEM THAT SLIDES TIGHTLY INTO A LITTLE SLOT IN THE CENTER OF THE UNDERSIDE OF THE KEYTOP. YOUR OBJECT THEN IS TO SLIDE THE KEYTOP UP OFF THE STEM. ALL PIECES ARE PROBABLY MADE OF HARD PLASTIC AND CAN BE BROKEN. IF YOU BREAK THE KEYTOP, YOU MIGHT BE ABLE (AFTER LOOKING AROUND A LOT) TO FIND ANOTHER. IF YOU BREAK THE STEM, YOU'RE PRETTY MUCH SHIT OUT OF LUCK AND WILL HAVE TO HAVE THE KEYBOARD REPLACED, WHICH MIGHT BE EXPENSIVE. THE TRICK TO GETTING THE LITTLE PIECES OF PLASTIC APART WOULD BE: PATIENCE, WITH ENOUGH FORCE BUT NOT TOO MUCH FORCE -- I'D PROBABLY USE THE LONG THIN (PLASTIC POCKET CLIP) END OF THE PLASTIC CAP FROM A BALLPOINT PEN AND TRY TO ROCK THE KEYTOP UP ABOUT 1/128 OF AN INCH AT A TIME BY PUTTING MY PLASTIC LEVER UNDER THE LEFT SIDE OF THE KEYTOP TO MOVE THE KEYTOP UP A SMIDGE, THEN PUTTING MY PLASTIC LEVER UNDER THE RIGHT SIDE OF THE KEYTOP TO MOVE THE KEYTOP UP A SMIDGE, REPEATING UNTIL THE KEY CAME OFF
How to Replace Keyboard Keys on a Toshiba Laptop
http://www.ehow.com/how_4843847_replace-keyboard-keys-toshiba-laptop.html