⭐Anonymous Delivery & Free Shipping⭐ Please check the actual photos for the product condition♪ #Click here for a list of baby's breath products✨☜ ⚠️Please be sure to check my page⚠️ Swirling water creates a funnel-shaped vortex when discharged from one bottle to another. By using paper scraps, food coloring, and lamp oil, and adjusting the drainage, you can treat the water in various ways. Watch the vortex spin in the bottle!!! This is an educational and fun experiment and activity for school classes, homeschoolers, and others. Create from 2 liters of water and colorful plastic connecting tubes. Quality and Durability: Made of high-quality plastic, it offers a long service life, and the striped surface of the connector makes it much easier to rotate. 40 pieces of bottle water tube experiment sensory 01-14