what is the diameter of the magnetic balls?

About 1.5 in, pretty much golf ball size

From the reviews, it looks like kids from 2 and up would enjoy these. Any feedback on kids 5 to 7?

Kids and adults enjoy these, in my experience. (No, I do not work for the company that produces this, and I do not sell this or any other toy product.)

What size are the metal balls?

I'm not sure of the exact size, but they do not pose a choking hazard for young children. I bought two sets for toddler classrooms. The children love them and they are safe to play with.

Does anyone know if these smart max pieces are compatible with the magformers version called “stick-o”s?

The magnets should work together however the Smart Max are bigger and rounder.

Smartmax Start Stem Building Magnetic Discovery Set For Ages 1

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440 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧲 Build brilliance from the ground up — STEM fun that sticks with you!

MAGNETIC MASTERY - Powerful magnets enable building of extraordinary, stable structures that defy gravity.
SAFE AWARD WINNING - Crafted with non-toxic, sonically welded bars ensuring durability and peace of mind for parents.
VIBRANT STEM STARTER - 23 colorful, oversized bars and metal balls designed to captivate and educate kids ages 1-10.
ENDLESS CREATIVE PLAY - Fully compatible with all SmartMax sets, encouraging limitless engineering and imagination.
EARLY ENGINEERING EDGE - Perfectly tailored for toddlers and young kids to develop critical STEM skills through tactile play.

The SmartMax Start STEM Building Magnetic Discovery Set is a vibrant, safe, and award-winning educational toy featuring 23 oversized magnetic bars and metal balls. Designed for children aged 1 to 10, it introduces foundational STEM concepts through hands-on, creative play. Its powerful magnets hold up to 60 times their weight, enabling kids to build extraordinary structures. Fully compatible with other SmartMax sets, it offers endless opportunities for imaginative engineering and skill development.

Specifications

ASIN	B071YNVKVZ
Additional Features	Non Toxic
Age Range Description	Baby
Best Sellers Rank	#46,178 in Toys & Games ( See Top 100 in Toys & Games ) #392 in Toy Magnetic Building Sets
Brand Name	SmartMax
Color	Colortpillow-20
Customer Reviews	4.7 4.7 out of 5 stars (265)
Educational Objective	Engineering Skills
Item Dimensions	14.96 x 11.89 x 2.44 inches
Item Weight	2 pounds
Manufacturer	Smart Toys and Games
Manufacturer Part Number	SMX 309US
Manufacturer recommended age	12 months - 7 years
Material Type	Plastic
Model Name	Start
Model Number	102918
Model Year	2021
Number of Pieces	23
Operation Mode	Manual
Set Name	Start
Size	Lumbar Cushion 20
Subject Character	Metal balls & Bars
Target Audience	Kids aged 1-10
Theme	Transportation
Toy Building Block Type	Magnetic Toy Building Block
UPC	847563009640

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440 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Poland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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SmartMax Start STEM Building Magnetic Discovery Set for Ages 1-10

Description

Specifications

Common Questions