Would these be ok for playyard or do you think they would get brittle staying outside?

They're pretty thick and plyable so they'd be OK for a long while. I think it'd be better in the shade tho

Are these all different heights?

Yes they are different heights. They are very sturdy and well made. My grandkids love them.

I have no idea. The children have great fun on them.

Is there a weight limit on this toy? Are they durable enough for an adult to stand on?

As per description: "Can withstand weights up to 110lbs."I would say a petite adult can safely stand on them, but not use them on a regular basis. They are made for children.

American Educational River Stone Set

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

🌊 Step up your child’s play—and their skills—with the River Stone Set!

DURABLE READY - Crafted from sturdy PP and TPE materials, supporting up to 220 lbs for long-lasting use.
CONFIDENCE BUILDER - Encourages kids to master jumping and distance judgment with fun, progressive difficulty.
SAFE SECURE PLAY - Rubber-studded bases prevent slipping and protect your floors—indoors or out.
COMPACT CONVENIENT - Stackable design means easy storage without cluttering your space.
DYNAMIC BALANCE CHALLENGE - Each stone’s varying steepness sharpens coordination and spatial awareness.

The Gonge American Educational River Stone Set is a 6-piece stepping stone kit designed for children ages 3-7 to improve balance, coordination, and spatial awareness. Featuring triangular stones with varying steepness and a non-slip rubber base, it supports up to 220 lbs and is stackable for easy storage. Ideal for indoor and outdoor use, this durable set promotes confidence and active play without requiring assembly or batteries.

Specifications

ASIN	B000ANIVRG
Assembly Required	No
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#166,482 in Toys ( See Top 100 in Toys ) #70 in Playground Fitness Equipment
Color	Original
Customer Reviews	4.8 4.8 out of 5 stars (1,863)
Date First Available	28 August 2012
Educational Objective(s)	Spacial Awareness
Item model number	2120
Language	English
Manufacturer recommended age	3 years and up
Manufacturer's Suggested Maximum Weight	99.79 kg
Material Type(s)	PP, TPE
Number of Game Players	1-6
Number of Puzzle Pieces	6
Product Dimensions	35.56 x 35.56 x 8.51 cm; 2.69 kg
Remote Control Included?	No
tech_spec_battery_description_toys	No batteries required

Reviews

M**N

しっかりしている

しっかりしていて、飛び乗っても移動したりすることはありませんでした。大人が乗っても大丈夫でした。

17.04.2017

C**A

Muy bien. Divertido y resistente

El peque (18 meses) se lo pasa muy bien subiéndose a las rocas. Y además puede jugar con los papás porque soportan hasta 100kg :)

20.01.2020

C**N

piedras de rìo

vienen en diferentes tamaños, perfectos para el desarrollo y estimulaciòn de los niños y personas que ocupen algún ejercicio de equilibrio, 100% recoemndado

4.07.2018

M**H

great Item

Perfect gift for kids to help teach stepping and balance

26.12.2020

"**"

Très bien !

Très bon rapport qualité prix. Elles sont solides, accrochent bien au sol, s'empilent pour être rangées sans prendre trop de place. Il y a même des idées de jeux et d'activités dans un petit fascicule qui accompagne. Je les recommande. Ma fille veut régulièrement les sortir et dès qu'elles sont installées, elles sont prises d'assaut par les enfants présents. Plein d'utilisations différentes peuvent être trouvées selon l'âge.

22.10.2019

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