You find them randomly or buy them from shops. Also, as part of their 1 trillion facebook pageviews promotion, you can receive a piece of the lab map at Grundo's Warehouse (Virtupets) using the redemption code NEO1TRILHPRZCDE.
you have to collect all 9 pieces of the secret laboratory map pieces
Once you buy all of the 9 expensive Lab Ray map pieces, you can go here to see your progress: http://www.neopets.com/games/treasure.phtml The map should vanish when you go to the Lab Map section, and it should give you the link.
There are 9 pieces of the petpet lab map as well as any other map.
You get the petpet lab ray by collecting all 9 pieces of the Petpet Lab Ray Map; however, you must already have the regular Secret Laboratory Ray (by collecting all 9 pieces of the Secret Laboratory Map)
to get to the lab ray you must assemble all 9 pieces of the secret laboratory map.
Do you have your secret laboratory map pieces yet? If you don't, that is probably why you can't use your petpet lab map pieces. You have to get the full 9 pieces of the secret laboratory first.
If you are talking about the secret lab map. You must have all 9 piece's of the map in your inventory then go to the laboratory and they will vanish because you have used them to get there but you will always be able to use them. (A current price of a full set right now is at least 100,000 neopoints)
when you are on it 24/7. When i was addicted to neopets i went on it straight after school all the way up to 9 o'clock (21:00 was my bed time back then) When someone asks for a paintbrush in art class and you yell, "SCAM!" When you have dreams about neopets. When you think about neopets all day long and wonder if that person excepts your trade for that lab piece to get the lab map. Once you are addicted, you CANNOT, I repeat, CANNOT stop playing. Its mentally impossible to stop playing once you are addicted. You then get obsessed, then overly obsessed, and you won't stop playing until something suddenly forces you to quit or you are 60 years old! When you place neopets since you were 10.
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Linden Lab's population is 9.
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Because 4 pieces of something that was cut up in 9 pieces is more than 4 pieces of something that was cut up in 10 pieces. If you cut it up in 9 pieces instead of 10, then the pieces are bigger.