ITEM NAME:fun magic swimming jellyfish Physics Teaching Resources magic octopus_3C Feature: The magician can control the small octopus in the bottle, let it up or down or stop. Easy to learn. Suitable for magician or the kindergarten kids. prepare ordinary mineral water bottle for yourself Operating instructions: Prepare a clean bottle, use flat smooth surface container; Filled with water in the bottle, and then put the octopus, and tighten the cap; Grasping the plastic bottle, magic octopus will sink in water, unclip plastic bottle, it will float; The magic trick of sinking fast - When the magic octopus is in the upper water, firmly grasp plastic bottle, whiskers of magic Octopus will fly, and then rapidly sink! Magic octopus will spin up. Like the elves rise and dance in a happy mood! The magic trick of the static Adjust the strength of loosing and griping, magic octopus can be suspended in the water. Specifications: Material: plastic Color: Send as random Size:15*8.5*1.5cm Note: Please allow 0-1cm error due to manual measurement..Grasping the plastic bottle, magic octopus will sink in water, unclip plastic bottle, it will float;. Filled with water in the bottle, and then put the octopus, and tighten the cap;. When the magic octopus is in the upper water, firmly grasp plastic bottle, whiskers of magic.