Best Plasma Balls for 2026
🔮The Smithsonian 5-inch plug-in plasma ball is the safe all-round pick: a well-known science-toy brand, a size that suits a desk or a kid's room, and the deepest price record we have for any plasma ball, with a median around $33.
How we chose. ShopSavvy doesn't test novelty lamps. These five picks come from the makers' published descriptions, Amazon owner ratings recorded by ShopSavvy, and ShopSavvy's own price history: 1,316 price observations from 58 retailers between December 2020 and September 2026.
How they work, and what to look for. A plasma ball sends high-voltage, high-frequency current from a small Tesla coil at its center through low-pressure noble gas, which glows in filaments that jump toward your fingertip when you touch the glass. Size sets the show: 4 to 6 inch globes suit a desk, 7 to 8 inch globes make bigger, more dramatic arcs. Most also have a sound-sensitive mode that flickers to music. Keep them away from phones, laptops and other electronics while they run, since the field can interfere with them, and supervise young children with any glass globe.
At a glance (median price ShopSavvy recorded):
- Overall: Smithsonian 5-inch plug-in, $32.99
- Best for kids and STEM: Thames & Kosmos 5-inch, $21.63 (last 12 months)
- Touch and sound modes: Discovery Kids 6-inch, $21.61 (last 12 months)
- Biggest arcs: Tradeopia 8-inch purple, $40.99 (2024)
- Smallest and cheapest: Lebbeen 4-inch, $19.99 (2024)
🥇Overall Best: Smithsonian 5-Inch Plug-In Plasma Ball
The Smithsonian 5-inch plasma ball plugs into the wall rather than running on batteries, so it can glow for as long as you like, and its compact black base fits a desk or nightstand. It is sold under the Smithsonian science-toy line, and it is the plasma ball with the most price history in ShopSavvy's records, which tells you how widely it is stocked.
Five inches is a modest size; if you want big, dramatic arcs, look at the 8-inch pick.
ShopSavvy has logged 749 prices for it from 37 retailers since May 2021, with a median of $32.99. The most recent, on May 28, 2026, was $30.99.
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🥈Best for Kids and STEM: Thames & Kosmos The Plasma Ball, 5-Inch
Thames & Kosmos' 5-inch plasma ball is sold as a STEM tool, and the maker's description explains the science: a Tesla coil at the core sends high-voltage alternating current through a noble gas, and escaping electrons make the gas glow on the inside of the glass. That framing, from a science-kit brand, makes it a good gift for a curious kid. Thames & Kosmos says it can sit on a tabletop or hang.
ShopSavvy has 129 prices for it from 11 retailers since June 2025; the 128 we recorded in the last 12 months had a median of $21.63.
Best Touch and Sound Modes: Discovery Kids 6-Inch Plasma Globe Lamp
The Discovery Kids 6-inch plasma globe reacts to touch and to sound, so the lightning can pulse along with music, and it comes with an AC adapter. A 6-inch globe gives noticeably fuller arcs than the 4 and 5 inch models while still fitting on a desk.
ShopSavvy has logged 434 prices for it from 25 retailers since December 2020, with a median of $31.19. The six prices we recorded in the last 12 months had a median of $21.61, and the most recent, on September 19, 2026, was $16.99.
Biggest Arcs: 8 Inch Purple Plasma Ball
The Tradeopia 8-inch plasma ball is the largest pick here, with purple arcs and both touch- and sound-sensitive modes. A bigger globe makes longer, more dramatic filaments, which is what you want for a party, a shelf display or a gift that gets attention.
It takes more space and costs more than the desk-size models.
Amazon owners rate it 4.4 out of 5 across 369 ratings recorded by ShopSavvy. The two prices we recorded, in September and October 2024, were $40.19 and $41.79.
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💸Budget Pick: Lebbeen Plasma Ball Lamp (4.0 Inches)
The Lebbeen 4-inch plasma ball is the smallest and least expensive pick: a glass globe on an ABS base that weighs about 400 grams, runs at 12 volts from a plug-in adapter with a 110 cm cable, and responds to touch and sound, according to the listing.
At 4 inches the light show is small, so treat it as a desk toy or stocking stuffer.
Amazon owners rate it 4.2 out of 5 across 809 ratings recorded by ShopSavvy. Both prices we recorded, in September and October 2024, were $19.99.
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How we researched this
How we chose these: these picks weigh published manufacturer specifications and aggregated owner and expert reviews for the 5 products listed here, alongside prices from ShopSavvy's price data. No retailer or brand pays to be included.
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