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 Pieces, Ages 8+, Math Manipulatives for Kids, Teacher Supplies, Back to School, Classroom Must Haves

Learning Resources Hexagram Weights - Set of 54 Pieces, Ages 8+, Math Manipulatives for Kids, Teacher Supplies, Back to School, Classroom Must Haves

Product ID: 1594911

🌈color-coded for easy sorting

📦compact storage box

⚖️54 precision weights

€ 44.56

Duties & taxes included

In stock

Sold byAmazon CyprusDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚖️ Master measurement with color-coded confidence!

COMPACT ORGANIZED - Includes a sleek storage box to keep your classroom clutter-free
VIBRANT COLOR CODING - Instant visual sorting boosts engagement and speeds up learning
PRECISION IN EVERY GRAM - 54 stackable hex weights from 1g to 20g for exact measurement mastery
VERSATILE LEARNING TOOL - Perfect for hands-on math lessons, scales, and balance experiments
DURABLE CLASSROOM READY - Built tough with high-quality plastic to withstand daily use

The Learning Resources Hexagram Weights Set offers 54 durable, stackable, and color-coded plastic weights ranging from 1g to 20g, designed for ages 8 and up. Ideal for classroom use, this set includes a convenient storage box and supports hands-on learning with scales and balances to enhance math skills and measurement understanding.

Specifications

ASIN	B000URFT3G
Age Range Description	8+
Best Sellers Rank	#48,671 in Toys & Games ( See Top 100 in Toys & Games ) #621 in Sorting & Stacking Toys
Brand Name	Learning Resources
Color	Multicolor
Customer Reviews	4.7 out of 5 stars 670 Reviews
Educational Objective	Math
Global Trade Identification Number	00765023042924
Included Components	Weights
Indoor Outdoor Usage	Indoor
Is Assembly Required	No
Item Dimensions	6.1 x 4.4 x 1.5 inches
Item Type Name	Hexagram Weights
Item Weight	0.32 Kilograms
Manufacturer	Learning Resources
Manufacturer Maximum Age (MONTHS)	120.0
Manufacturer Minimum Age (MONTHS)	8
Manufacturer Part Number	LER4292
Material Type	Plastic
Model Number	LER4292
Number of Players	1 or more
Operation Mode	Manual
Set Name	Hexagram Weights 54-Piece Set
Size	54 Pieces
Supported Battery Types	No batteries required
Theme	Education
UPC	858160441337 885520233547 765023042924
Unit Count	1.0 Count

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