Fun at the Beach

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Across
  1. 2. land at the edge of a lake or ocean
  2. 3. a castle made by molding wet sand at a beach
  3. 5. the pair of some simple words that have opposite meanings
Down
  1. 1. flat platform made of materials that can float
  2. 2. thick piece of material used on a bed for warmth
  3. 4. gathering of people where food is eaten outdoors