My daughter needs small weights for her 7th grade science fair project, are these appropriate or for small children only?

They are NOT accurate. I have a digital kitchen scale that I have no reason to doubt, and the 1 gram pieces weight under while the 10 and 20 gram pieces are over. Do not expect accuracy for any purpose, including between themselves.

What is the total weight for all combined pieces? I'd like to use these in a ship building activity- are they waterproof too?

There are 54 pcs, totaling 300g. 20-1g, 20-5g, 10-10g, and 4-20g. Yes they are waterproof as they appear to be of a coated resin /plastic composite. Good quality.

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Learning Resources Hexagram Weights, Set of 54 Weights, Includes 1g, 5g, 10g, 20g, Ages 8+

Learning Resources Hexagram Weights, Set of 54 Weights, Includes 1g, 5g, 10g, 20g, Ages 8+

Product ID: 358823669

🌈color-coded for easy ID

🧩stackable hexagonal design

⚖️54 precision weights

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MX$1607

Duties & taxes included

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Sold byAmazon MexicoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚖️ Stack, weigh, and win the math game!

VIBRANT COLOR CODING - Distinct colors for each weight make math intuitive and engaging
DURABLE KID FRIENDLY - Made from sturdy plastic, designed for ages 8+ to foster STEM skills
MASTER MASS MEASUREMENT - 54-piece set with 1g, 5g, 10g, and 20g weights for precise learning
SPACE SAVING STACKABILITY - Hexagonal shape allows secure stacking and easy storage
READY FOR HANDS ON LEARNING - Perfect companion for scales and balances to demonstrate mass

The Learning Resources Hexagram Weights set includes 54 color-coded, stackable plastic weights ranging from 1g to 20g, designed for children aged 8 and up. Ideal for hands-on mass measurement activities, this compact set enhances STEM learning by making abstract math concepts tangible and fun.

Specifications

ASIN	B000URFT3G
Age Range Description	5 years to 9 years
Best Sellers Rank	#81,740 in Toys ( See Top 100 in Toys ) #1,141 in Educational Science Kits
Brand Name	Learning Resources
Color	Multicolor
Customer Reviews	4.6 4.6 out of 5 stars (651)
Educational Objective	Math
Global Trade Identification Number	00765023042924
Included Components	Weights
Indoor Outdoor Usage	Indoor
Is Assembly Required	No
Item Dimensions	15.5 x 11.2 x 3.8 centimeters
Item Type Name	Hexagram Weights
Item Weight	0.32 Kilograms
Manufacturer	Learning Resources
Manufacturer Maximum Age (MONTHS)	120.0
Manufacturer Minimum Age (MONTHS)	12.0
Manufacturer Part Number	LER4292
Material Type	Plastic
Model Number	LER4292
Number of Players	2-4
Operation Mode	Manual
Power Source	Hand-powered
Set Name	Hexagram Weights 54-Piece Set
Size	54 Pieces
Supported Battery Types	No batteries required
Theme	Space
UPC	858160441337 885520233547 765023042924
Unit Count	1 Count

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TrustScore 4.5 | 7,300+ reviews

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