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Sand Dollar
Dendraster excentricus		  


Photo ©Patricia McQuade

The sand dollar you pick up on the beach is just a skeleton. The living one you see underwater looks very different.

Sand dollars are related to sea urchins, and have spines just like an urchin. But the sand dollar's spines are very tiny and have hairs on them, so it looks more like purple velvet. Just like an urchin, the sand dollar uses its spines to gather food (plankton). It also uses the spines for moving over the sand.

Sea stars, sea cucumbers and sea urchins eat sand dollars.
Earth Cards
Nature Trading Cards

What are Earth Cards?

Trading cards?  Flash cards?  Game cards? Animal cards? Earth cards are all of these.

  • Collect them like baseball cards.
  • Play games with them like a game deck.
  • Use them as flash cards and species cards for learning. 
  • Trade them with your friends.

Order your set of
Nature Trading Cards

Box of 35 cards          $5.00
Box of 65 cards        $10.00
Box of 100 cards       $15.00

Purchase directly from this website with your check or PayPal.

You can customize your box of cards. Just go to Choose your cards and pick the species you want included.  
A box of Nature Trading Cards would be a nice gift for your child's classroom. You can also order them in quantities, at special prices, to use as fundraisers for your school. Schools