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PlanToys

Rock & Balance · Stack & Build · 3 years+

Rock & Balance · Stack & Build · 3 years+

Regular price $35.99
Regular price Sale price $35.99
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3 years

Quantity
  • Safety-tested to ASTM F963
  • Ships from the US in 2–7 days
  • 30-day returns

PlanToys Geo Stacking Rock. A set of wooden stones in earthy colors that stack into balanced towers. There is no right answer, only a tower that stands or one that does not, which makes this a quiet, absorbing game for a three-year-old and a surprisingly good one for the adult sitting next to them.

PlanToys rubberwood with water-based dyes. Graded 3 years and up by the manufacturer.

Safety & age grading

Everything on this page is what we require before a toy goes on sale. It is also what you should ask of any toy store.

The standard we hold to

In the United States, every toy sold for children under 12 must be tested by a laboratory accepted by the Consumer Product Safety Commission and certified with a Children's Product Certificate (CPC). The tests cover the toy safety standard ASTM F963 (mechanical and physical hazards, small parts, cords, magnets, sound), lead in paint and substrate, phthalates in plastics, and flammability. For toys intended for children under three there are additional small-parts and mouthing rules.

We only list products from brands that certify to these standards and hold a current CPC for the product. We keep a copy of each brand's certificate on file and will send it to you on request.

What that rules out

A large share of the toys sold online, especially the wooden and "Montessori" toys shipped directly from overseas marketplaces, have never been through this testing and cannot produce a certificate. We don't sell those. If a product looks like something you've seen on a marketplace for a third of the price, that price difference is usually the testing.

Materials

  • Wood: beech, maple, rubberwood and birch, finished with water-based, non-toxic stains or left unfinished. Unfinished wood is exempt from heavy-metal testing by federal determination and is our preference for the youngest ages.
  • Silicone: food-grade, BPA-free, free of phthalates and PVC. Used for teethers, stacking cups and sensory balls.
  • Textiles: organic cotton or plant-dyed silk, tested for flammability.
  • Magnets: only in products graded 3+ and only where the magnets are fully enclosed and the product has passed the flux and drop tests in ASTM F963. We do not sell magnetic toys for children under three.

How we grade age

Every product page shows the manufacturer's minimum age and our own developmental stage. Where they differ we show the stricter one. A "3+" label is a legal statement about small parts, not a suggestion; we don't put 3+ items in kits for younger children, even when the child seems ready.

Small parts, cords, and anything a child can stand on carry a note in the Safety notes section of the product page. Supervision is always assumed.

If something is wrong

If a product arrives damaged, breaks in use, or you have any safety concern, stop using it and contact us. We replace or refund first and ask questions after, and we report every incident to the brand. You can also report product safety incidents directly to the CPSC at SaferProducts.gov.

Shipping & returns

Ships from the US in 2–7 business days, free over $50. 30-day returns on unused items. Damaged on arrival? Send a photo and we replace it.

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Made for this stage

  • 3 years
  • Fine motor
  • Problem solving
  • Early math

What your child practices

  • Physical · placing a stone with fine control of fingers and wrist, adjusting a wobble instead of knocking it over (3–4 years)
  • Cognitive · judging balance and where the weight sits, planning a build and changing it when it falls, sorting by size and color, counting the stones and comparing heights (by 3 years)
  • Social-emotional · taking turns in a two-player game, handling a fallen tower and starting again, playing with a sibling or friend (3 years)
  • Language · describing with "heavy", "flat", "on top", "under"; explaining "why did it fall?" in a short sentence (3–4 years)

What's in the box

  • 6 wooden stacking gems in assorted shapes

Materials & safety

  • Rubberwood (chemical-free, reclaimed)
  • Water-based dyes
  • Non-toxic finish
  • ✓ ASTM F963
  • ✓ CPSIA
  • ✓ EN 71

Made by PlanToys in Trang, Thailand from reclaimed rubberwood with water-based, non-toxic dyes. Tested to ASTM F963 and CPSIA; we keep the manufacturer's Children's Product Certificate on file before a product goes live. Age shown is the manufacturer's grade. Inspect wooden toys regularly and retire any piece that cracks or splinters.

How we check safety →

From Zenia

How to play together

This rock set evolves with your child! They are pretty cool even for adults to play with! To begin with, take turns adding one stone each until the tower falls. Whoever knocks it down starts the next one. That is the whole game and it lasts for years.

Ask "which stone should go on the bottom?" and let them test their answer. Being wrong and seeing why is a powerful skill.

Line them up by size, then by color, then stack the line. At three, sorting is as satisfying as building.