Vibrant Colors: Enhance your aquatic toy environment with our hatch and grow axolotl eggs set featuring four stunning colors – Pink, Purple, Green, and Blue. Easy Hatching Process: Watch as these adorable creatures hatch and grow by just soaking in water for 24-72 hours, creating an engaging and educational experience for hobbyists of all ages. Optimal Size: Each axolotl egg measures a perfect 2.5 inches, providing an ideal environment for growth and hatching. They will double in size over several days! Fun science experiment for kids who love creatures as cute as axolotls! These items work great as party favors, stocking stuffers, or just a fun indoor activity!