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 included

⚖️54 precision weights

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€ 25.02

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Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚖️ Stack, weigh, and win the classroom with color-coded precision!

COMPACT ORGANIZED - Includes a durable storage box to keep your classroom or homeschool space clutter-free and ready to teach.
VIBRANT COLOR CODING - Bright, distinct colors make sorting and learning intuitive and visually engaging.
BUILT TO LAST INSPIRE - Durable plastic construction designed for ages 8+ ensures years of interactive, tactile learning fun.
PRECISION IN EVERY GRAM - 54 stackable hexagonal weights ranging from 1g to 20g for hands-on mass measurement mastery.
VERSATILE LEARNING TOOL - Perfectly pairs with any balance scale to demonstrate real-world math concepts and foster STEM curiosity.

The Learning Resources Hexagram Weights set offers 54 durable, color-coded plastic weights (1g, 5g, 10g, 20g) designed for ages 8 and up. Ideal for classroom or homeschool use, these stackable hexagonal weights come in a compact storage box and work seamlessly with any balance scale to enhance hands-on math learning and measurement activities.

Specifications

ASIN	B000URFT3G
Age Range Description	8+
Best Sellers Rank	#32,331 in Toys & Games ( See Top 100 in Toys & Games ) #416 in Sorting & Stacking Toys
Brand Name	Learning Resources
Color	Multicolor
Customer Reviews	4.7 out of 5 stars 664 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

Reviews

J**T

20.01.2016

N**A

10.12.2015

S**N

4.04.2024

A**N

27.02.2014

J**E

19.08.2016

N**J

5.01.2015

G**I

7.05.2021

M**N

6.10.2013

M**H

19.12.2025

C**N

23.12.2014

A**A

16.01.2026

K**H

17.10.2021

F**U

22.12.2024

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