Red Vampire Crab.
 
Set up just like a dartfrog. They should have access to water, such as in a plaudarium.  Lots of plants. These will eat anything you offer. They can eat live foods like fruit flies, or prepared foods like fish pellets. They do seem to love fresh frozen mysis shrimp.
 
Shipping - If you are in MN, WI, or IA, you can select the $7.50 shipping for 1 day delivery. All other states must select $30 next day shipping.