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Seamonkeys Magic Castle World's Only Instant Pets, Ages 6+

Prices as of September 26, 2026, as listed by each retailer — verify the current price on the retailer's site before purchase.

Price history tracked at Bloomingdale's price tracker

14-day low
$41.99
Sep 13 · Bloomingdale's
Best price
$41.99
−0% vs high
14-day high
$41.99
All stores
$42$42$42
Sep 13Sep 26
  • Bloomingdale's
Lowest in 14 days: $41.99 at Bloomingdale's. Highest: $41.99. Current best is 0% below the 14-day high.

About this product

The Seamonkeys Magic Castle is a novelty toy kit by Schylling designed for children ages 6 and up. It includes a plastic habitat tank with a built-in magnifying lid, Sea-Monkeys eggs, food, a measuring spoon, and instructions. The kit allows kids to hatch and care for their own microscopic Sea Monkeys by adding boiled or bottled water. The tank's compact size measures 7.3 inches long and 5.5 inches wide, and its tip-proof design ensures stability. The product is intended as an educational and entertaining science activity, encouraging observation of tiny aquatic creatures over time.

  • Includes habitat tank and eggs
  • Plastic construction, wipe clean
  • Built-in magnifier lid
  • For ages 6-13
  • Requires boiled or bottled water

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Seamonkeys Magic Castle World's Only Instant — Price History