Magical Underwater Scene：Place the floating astronaut ornaments above the luminous stones to simulate a deep-sea diving adventure. The glowing effect at night brings the entire aquarium to life like a glowing reef. Good Playmate for Fish: The pebbles are made of glow-in-the-dark resin, The astronaut is made of environmentally friendly resin, Hand coloring，with very flat and smooth edges. Cute little astronaut is good playmate with your fish. Adjustable position: Add a playful touch with two realistic astronaut figures that float using invisible fishing line. The diving position of the astronaut can be adjusted according to the length of the fishing line. The floating ball can be opened. If you feel that the astronaut is floating too fast, you can add water appropriately. More Than Just Fish Tanks: Our glow in the dark rocks perfect for fish tanks, vases, fairy gardens, terrariums, and outdoor paths. Whether creating a glowing underwater scene or a whimsical landscape, this set adds wonder to any space. Interactive Fun for Fish Tank: The perfect combo for family and fish lovers—watch the floating astronauts and glowing pebbles together spark curiosity, storytelling, and sensory delight. How Pebble Glows: Let the glow stone rocks absorb enough sunlight or artificial light for at least 4 hours, you can enjoy the beautiful and dreamy night light at night. luminous glowing pebbles absorb and store energy from sunlight or lamplight,then light up in dark environments for 3-6 hours then gradually dim away.glow stones can repeatedly absorb light,storage light and emit light.