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Building & Science

Build it. Test it. Discover why.

Curiosity lives here. From hands-on building kits to mind-opening science experiments, this collection is made for thinkers, tinkerers, and big-question askers. Explore toys and tools that spark problem-solving, fuel creativity, and deliver those unforgettable “whoa!” moments. Because sometimes the best kind of play is figuring out how things work — one build, test, and breakthrough at a time.

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Thames & Kosmos Robot Engineer building kit box showing colorful robot and construction pieces
$42.99 - $42.99
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Kids First | Robot Engineer

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Thames & Kosmos I Dig It Glow-in-the-Dark Dino Egg excavation kit with display box
$5.99 - $5.99
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I Dig It | Glow-in-the-Dark Dino Egg

Only 2 left!

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Thames & Kosmos Make & Display Colorful Crystals kit display showing multiple crystal growing sets
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Make & Display | Colorful Crystals Asmt

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Thames & Kosmos GeckoBot 2.0 STEM educational kit packaging showing wall-climbing gecko robot
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GeckoBot 2.0

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Illuminated circular sand art display with orange sand patterns on white LED base
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Lyells Sand Art LED

Only 2 left!

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KidzLabs Color Lab Mixer science kit with test tubes, color palette, and crystal experiments
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Kidzlabs | Color Lab Mixer

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Spy Labs Ultimate Spy Sleuth surveillance kit with night vision goggles and motion detector
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Spy Labs | Ultimate Spy Sleuth 1

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Crystal Growing kits by 4M showing three color variants with packaging and display containers
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Crystal Growing

Only 1 left!

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Thames & Kosmos Dusty Robot Vacuum Cleaner STEM kit packaging box showing robotic vacuum
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Dusty | Robot Vacuum Cleaner

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SolarFlower Sapphire Swirl STEM kit box showing blue spinning solar-powered flower
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SolarFlower | Sapphire Swirl

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KidzLabs Buzz Wire Making Kit showing blue base with wire formations and packaging
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Kidzlabs | Buzz Wire Making Kit

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Magna-Tiles microMags Travel Deluxe packaging with colorful magnetic building blocks on a white background
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Travel Set Deluxe | 48 pc

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Purple flower-shaped butterfly feeder with orange butterfly feeding on yellow center nectar area
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Butterfly Feeder

Only 2 left!

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Complete microscope set with case showing all included accessories and components
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Microscope Set w/Case

Only 1 left!

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Black and purple dragon LEGO set with minifigure on gradient background
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Disney | Maleficent Dragon

in stock

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Thames & Kosmos My Discovery Telescope STEM kit packaging with telescope displayed
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My Discovery Telescope

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Dr.STEM Toys rock and gem dig kit showing children excavating specimens outdoors
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Discovery Rock & Gem Dig Set

Only 2 left!

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KidzLabs Build Your Own Binoculars kit with green safari-themed binoculars and packaging box
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Kidzlabs | Build Your Own Binoculars

Only 1 left!

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NOVA Obsidian Excavation Lab kit with black volcanic rock, gems, and excavation tools
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Nova Obsidian Exc Lab

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Thames & Kosmos V8 Race Car STEM kit box showing red motorized model car
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V8 Race Car

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Purple and blue LEGO Ninjago dragon with wings and golden claws on red background
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Ninjago | Rontu the Master Dragon Rider

Only 1 left!

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Box of Mag Rush The Oggs Launchables toy set with character illustrations on a white background
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The Launchables | Oggs Characters

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Mag Rush Launchables toy set with colorful 'Ergg' figures and packaging
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The Launchables | Erggs Characters

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LEGO Star Wars 327th Star Corps Clone Troopers Battle Pack set 75431 box
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Star Wars | 327th Star Corps Clone Troopers Battle Pack

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