Would this be suitable for a highly precocious 4-year-old?

I would say yes most definitely. What my grandchildren enjoyed about this product is the cards to give them ideas of things that they can make with the blocks they found it very entertaining and it's been inspired in inspired creative and talking to them things if I following visual directions

Can you purchase more challenge cards?

I do not know but I would suggest that you try to email the company that makes this item you may be able to purchase on there site, Or try amazon maybe they have a generic type of card

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Learning Resources STEM Explorers Brainometry

Learning Resources STEM Explorers Brainometry

Product ID: 732803500

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Details

Brand
ラーニング
Puzzle type
Jigsaw
Manufacturer Minimum Age (MONTHS)
72
Number of Pieces
34
Product Dimensions
22.9L x 20.3W

📐34 precision plastic pieces

🧠Boosts critical thinking & problem solving

🧩10 STEM challenges

Description

🧠 Crack the code of shapes and join the STEM elite!

COMPACT PORTABLE - Lightweight 294.8g set fits perfectly in backpacks for learning on the go.
INCLUSIVE LEARNING - Unisex design and recommended for ages 6+, perfect for diverse classrooms and home use.
UNLOCK STEM MASTERY - 10 engaging shape puzzles designed to sharpen geometry and sorting skills.
SCREEN FREE BRAIN TRAINING - No batteries needed—pure hands-on cognitive development.
GIFT READY FOR EVERY OCCASION - Ideal for birthdays, holidays, and back-to-school boosts that parents and teachers trust.

Learning Resources STEM Explorers Brainometry is a 34-piece plastic puzzle set featuring 10 STEM challenges that develop critical thinking and problem-solving skills in children aged 6 and up. Battery-free and portable, it’s perfect for classroom or home use, making it an essential educational gift for any occasion.

Specifications

Model Number	LER9306
Number of Game Players	1
Number of Pieces	34
Batteries Required?	No
Batteries Included	No
Material Type(s)	Plastic
Target Gender	Unisex
Manufacturer recommended age	6 years and up
Item model number	LER9306
Product Dimensions	22.86 x 20.32 x 0.25 cm; 294.8 g
ASIN	B097F49QYH

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