At the Binary Bard's secret planetoid, entering the castle requires you to flip over 20 "cards" or puzzle sections to reveal a hidden picture (and enter the castle).
For the solution, see the related question.
Click on his card in your items bag.
it does not say library card you have to click McM because that what it says on the library card again not library card
The only "card holder" on Poptropica is for the Cosmic Symbols password on Astro Knights island. Th girl with the card is upstairs in the Mill.
You go to Mordred's Museum and click the books on the top floor. The manager won't let you have the books, but you get the card.
Click 10 of the "card" panels exactly one time each: all four panels in the 2nd row the middle two panels in the 3rd row all four panels in the 4th row. (To reset the puzzle, close and reopen.)
On your library card{If you got it} it is at the top.It is underlined in red it's in non-fiction McM.Hope that helps!
There is a stack just the right of the museum guide. To pay your admission, get the gold coin from the fountain outside.
The Cosmic Symbols card lets you access the hidden panel on the town fountain. Pressing the three symbols (and the center Sun) will open the plaque.
You need the Princess's secret message from the maid's room (castle first floor left).
It's downstairs. Press one of the stacked books with a paper on it, and it should get you the library card.
Unless the puzzle pieces to the castle door are turned in the proper sequence, you cannot eliminate certain unflipped cards. The proper procedure is listed at the related question, but generally just touch each card in the 2nd and 4th rows, and the middle two cards in the 3rd row.
Mordred had often been going to the same location in the castle library (castle, first floor right).