You don't combine cards. You go to 'combo' under 'Add Cards' and you click on one of the combos. these are already arranged in combos that when combined give you a Clue
You don't.
don´t combine cards, you click combos under Add Cards
they are cards that you can unlock clues and replicators for.
You can start combining cards on the 39 clues after book four comes out. The "my cards" page will be up graded. The cards that you have already will combine automatically, just go to my clues and you will have new clues. To know if you have a card that can combine in the series two, look in the top left corner. If you see a key your card can combine with other cards with a key with the same symbol such As an alien or Africa. Ask more questions because I know the answers, but I will not give away card codes or puzzle answers.
The contest for free The 39 Clues cards expired in 2011. To get cards now, you must purchase them.
the books will only give you ten clues so the cards fill in the gaps along with the 39 clues website
a grate card code for the 39 clues is P32979TXXP
P4cmrfpmxp
this is a card that is reusable... P2W7RRJ4XP share it with ur 39 clues friends!
P3WJ46RRXPP369t2x9xpp22r4j4xpp24kgtxfxpp2mrhfjxpp29pcfnxpp2h2hjxxpp22d374xpp2hfrngrxpp2c2r4pxpp37g2nnxxpp2hfmpmxpp39ffm3pxpP3JGTT73XPP249F7TDXPp37jkkfpxp
P32d3ff9xpp2c2rd4pxpp2hfrngrxpp2hfmmpmxpp369t2x9xpp39ffm3pxpP3JGTT73XPP249F7TDXPP3F2M3NPXP
P2c2rd4pxpP22D3743XPP2HFRNGRXPp2hfmmpmxpP369T2X9XPP39FFM3PXPP3JGTT73XPP249F7TDXP
no