【Intuitive Plasma Science Demo】Equipped with the Plasma Toroid Drive Circuit, the plasma ball ionizes inert gas via a precise electric field inside its sealed glass sphere, turning abstract ionization principles into vivid, visible light beams. 【Dual Size Compatibility】The Plasma Toroid Drive Circuit powers 9cm and 13cm plasma balls. 9cm is compact for desktops/travel, 13cm makes striking centerpieces—both deliver brilliant neon glow and stable plasma effects for diverse uses. 【Safe & Reliable Design】The Plasma Toroid Drive Circuit features built-in insulation for safety. Touching the plasma ball’s glass is safe, but avoid exposed coils—high-voltage protection prevents electric shock or burns. 【Interactive Plasma Science Demonstration】Sealed glass globe ionizes xenon gas via a precise electric field, visualizing core principles of static electricity and ionization. An essential physics lab tool that transforms abstract STEM concepts into captivating experiments—no fragile tubes or plates required. 【Versatile Decor & Educational Gift】Powered by the Plasma Toroid Drive Circuit, this plasma ball is perfect for party decor, quirky gifts, and STEM education, ideal for teachers, science lovers and curious learners.