Klutz LEGO Chain Reactions
Build 10 LEGO machines and link them into chain reactions
About $20brand list price View on Amazon
Thames & Kosmos SolarFlower: Ruby Ripple
A sun-powered kinetic flower that teaches motors and gears.
Best for kids who like building machines powered by the sun.
$24.95Thames & Kosmos list price
This is Thames & Kosmos’s own list price (checked November 13, 2026). Amazon’s price is often lower; tap above for today’s price. Paid link: Electroys may earn a commission at no extra cost to you. Listing verified October 28, 2026. See Thames & Kosmos’s product page.
At a glance
- Age guidance
- Ages 8+
- Price
- $24.95 list price
- Screen needed
- No, fully screen-free
- Batteries
- Solar powered
- Adult help
- Varies
- Play style
- Solo or together
- What it is
- 114-part solar-powered mechanical flower kit
- Great for
- Stocking Stuffer, Holiday, Birthday
Kids build a red mechanical flower from 114 parts whose petals all turn together, driven by a single solar-powered motor and planetary gears. The spinning petals create an optical ripple effect, and the manual explains how solar cells make electricity.
Why we picked it
- 01No batteries: runs on sunlight
- 02Planetary gear system kids can see in motion
- 03Petals swap with other SolarFlower kits
What they’ll learn
Always follow the manufacturer’s age and safety guidance. Small parts may be a choking hazard for children under 3.
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