Magnetic Constructor Blocks Set - STEM Building Toy for Kids
138PC Storage Box
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Is this toy safe for my child?
Yes, all our toys are made from non-toxic, child-safe materials and meet strict safety standards.
Shipping Time: Orders process in 1–3 business days; US delivery takes 5–10 business days.
Return Window: Returns are accepted within 30 days of delivery for unused items in original packaging.
The Magnetic Constructor Blocks Set is a stick-and-ball magnetic building toy made up of colorful magnetic rods and connector balls that snap together to form 3D shapes — pyramids, domes, arches, and countless freeform structures. The set is sold in multiple piece-count options, from a compact 25-piece starter pack up to a 138-piece set with its own storage box, so you can pick the size that fits your child's play needs. Smooth, rounded pieces and strong internal magnets make it easy for small hands to build, take apart, and rebuild again, encouraging open-ended STEM play and fine motor development.
Key Features & Benefits
- Stick-and-ball magnetic design: rounded balls (4cm) connect with straight (9cm) and curved (7.5cm) magnetic rods for sturdy, varied builds
- Multiple set sizes: available from 25 pieces up to 138 pieces, with the larger sets including a plastic storage box
- 100+ build possibilities: follow the included 3D model guide or freestyle your own shapes
- Smooth, child-safe ABS construction: rounded edges and a big-size, smooth-touch design for younger builders
- Strong, consistent magnets: pieces click together securely without the whole build falling apart mid-play
- Portable storage: larger sets pack into their own carry box or drawstring bag for easy cleanup
Technical Specifications
| Material | ABS plastic with embedded magnets |
| Ball Connector | 4cm diameter |
| Straight Rod | 9cm length |
| Curved Rod | 7.5cm length |
| Short Connector | 5.5cm length, 2cm diameter |
| Set Sizes | 25, 36, 42, 50, 64, 72, 84, 100, or 138 pieces (selected at checkout) — piece colors are random |
| Recommended Age | 3 years and up |
What's Included
- 1 x Magnetic Constructor Blocks Set — balls and rods in the selected piece count (random color mix)
- 1 x Storage box (100 & 138-piece sets) or drawstring bag (smaller sets)
- 1 x Instruction booklet with 3D model build ideas
- Not included: additional pieces beyond the selected set size
Care & Usage
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Wipe pieces clean with a soft, slightly damp cloth. Avoid soaking in water.
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Keep away from electronic devices, credit cards, and pacemakers due to magnet strength.
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Inspect pieces periodically for cracks that could expose the internal magnets.
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Store in the included box or bag to keep the set together between uses.
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Adult supervision is recommended for younger children. Contains small parts.
Frequently Asked Questions
1. What piece counts are available?
A: This set comes in several sizes — 25, 36, 42, 50, 64, 72, 84, 100, or 138 pieces — so you can choose a compact starter pack or a larger set with a storage box.
2. Is this safe for young children?
A: It's recommended for ages 3 and up. Because it contains small magnetic balls and rods, adult supervision is recommended and it isn't suitable for children who still mouth toys.
3. How big are the pieces?
A: Connector balls are 4cm across, straight rods are 9cm, and curved rods are 7.5cm, giving a good range of scale for towers, domes, and other 3D shapes.
4. Does it come with a storage box?
A: The 100-piece and 138-piece sets include a plastic storage box; smaller sets ship in a drawstring bag instead.
