Scope: Beach & Sand Toys = sand-digging/molding toys (buckets, shovels, sieves, molds) and inflatable beach balls only. Kites (sibling leaf `kites`), bodyboards/boogie boards (sibling `watersport-boards`, active vertical), water guns/soakers (sibling `water-play`), pool floats/tubes/loungers (sibling `pool-accessories`), paddle-ball sets like Matkot/Kadima (sibling `racquets`), sandboxes and sand tables (sibling `sandboxes`), and kinetic/moon sand (sibling `play-dough`) are excluded as sibling territory, confirmed by grepping catalog.json.

Seed: (1) The pastry-chef equivalent here is the oral-valve inflation ratio and the water-to-sand ratio that lets a mold hold its shape — a number/relationship an expert reads off, not a brand claim. (2) The persona would notice first that "sand toy" specs are really about whether the sand itself is prepped right (damp vs dry), which no listing states but every mold-detail claim depends on.

Sources:
[wikipedia_beach_ball] https://en.wikipedia.org/wiki/Beach_ball — panel/valve construction and hand-sized-to-3ft+ size range — fetched excerpt: "two circular end panels, one with an oral inflation valve...range from hand-sized to over 3 feet (0.91 m) across"
[wikipedia_sandcastle] https://en.wikipedia.org/wiki/Sandcastle — damp sand cohesion mechanism and bucket/shovel as main tools — fetched excerpt: "Shovels and buckets are the main construction tools...binding between the individual granules"
[wikipedia_bucket_and_spade] https://en.wikipedia.org/wiki/Bucket_and_spade — canonical term, categorized "Beach toys" — fetched excerpt: page header "Beach toys" category tag (article body itself is a stub)
[wikipedia_astm_international] https://en.wikipedia.org/wiki/ASTM_International — ASTM F963 mandatory for US toys under CPSIA — fetched excerpt: "All toys sold in the United States must meet...ASTM F963...as part of the Consumer Product Safety Improvement Act (CPSIA) of 2008"
[cpsc_toy_safety] http://web.archive.org/web/20250103065650/https://www.cpsc.gov/Business--Manufacturing/Business-Education/Toy-Safety — ASTM F963 mandatory, constant air inflatables in scope, small-parts rule — fetched excerpt: "ASTM F963 a mandatory consumer product safety standard...Constant air inflatables...must also not release a small part per 16 C.F.R. part 1501"
[ec_toy_safety_directive] https://single-market-economy.ec.europa.eu/sectors/toys/toy-safety_en — EU directive scope and CE marking — fetched excerpt: "physical and mechanical, flammability, chemical...risks...all toys sold in the EU must carry a CE marking"

Branches: product_type -> sand_toy_set routes to composition/mold-detail/nesting (sentence: bucket/shovel/mold/sieve construction tools, wikipedia_sandcastle + wikipedia_bucket_and_spade); -> beach_ball routes to inflation/valve/size (sentence: panel+valve+size-range description, wikipedia_beach_ball). age_range -> toddler_1_3 pulls small_parts_age_warning forward (sentence: small-parts rule for under-3s, cpsc_toy_safety).

Noise: "paddle/ball shape and material" (Matkot/Kadima rows) — left out, belongs to sibling `racquets` leaf, not beach_toys. "wind range / line count" (kite rows) — left out, belongs to sibling `kites` leaf. "core material / stringers" (bodyboard rows) — left out, belongs to sibling `watersport-boards` leaf (active vertical). "pump mechanism / reservoir capacity" (water gun rows) — left out, belongs to sibling `water-play` leaf. "phthalate-free labeling" — researched (CPSC, EC pages) but the word "phthalate" did not literally appear in either fetched page's text, so dropped rather than cited on an inference. [2026-10-26 correction: re-fetched CPSC's CPSIA statute page and Wikipedia's Phthalate page, which do state the claim with a numeric limit; promoted to the `chemical_safety_claim` facet below.] "Dishwasher safe / easy to rinse" (Green Toys brand page) — a generic plastic-care claim, true unchanged of any hard plastic or silicone product regardless of category; fails the expertise generic-test, same bucket as the page's "Manufactured in the USA" and dimensions rows, so left as noise rather than a facet.

Corrections (2026-10-26):
- Fixed CONTRADICTED claim: re-fetched cpsc_toy_safety and confirmed "constant air inflatables" is on the CPSC's list of things excluded from the regulatory "toy" definition (16 C.F.R. part 1250), alongside bicycles, playground equipment, and kites — i.e. it names blower-fed amusement structures like bounce houses, not sealed balls. Rewrote the "Constant air inflatable" vocabulary entry to say this and stop calling beach balls that; mechanism's claim that beach balls and sand toys share the ASTM F963/EN 71 floor stands unchanged, since a sealed beach ball is an ordinary toy, not the excluded category.
- Added full facet `chemical_safety_claim` (BPA-/phthalate-free, food-contact-grade) with two sources (cpsc_cpsia_phthalates: CPSIA Section 108 phthalate limits; wikipedia_phthalate: the 0.1% US/EU cap) and two new vocabulary entries ("Phthalate", "Food contact grade"), closing the Green Toys coverage gap.
- Added `sandboxes` (Sandboxes & Sand Tables) to the Scope exclusion line; it was missing despite being the sibling most confusable with `sand_toy_set_composition`.
- Rejected the "dishwasher safe" coverage gap as a facet: it's a generic plastic-care claim with no category-specific expertise content (same bucket as "Manufactured in the USA"); documented as a Noise line above instead.
- No action on the age_range split-question-genericness note: checker itself said no action required; the branch consequence (small-parts rule) remains category-specific even though the question text is boilerplate.