Scope: "Play Dough, Putty & Drawing" (toys > play_dough) covers four product types treated differently by buyers — modeling dough, silicone putty, glue/gum-based slime, and reusable drawing boards/mats — routed via the product_type split. Oven-bake/air-dry craft clay (Sculpey, Fimo, Plasticine) is a different craft-aisle category and is out of scope. Moldable sand compounds (Kinetic Sand) and foam-bead compounds (Playfoam) are a different base material shelved on the same "slime & compounds" retail shelf (per The Toy Insider) but have no taxonomy leaf of their own yet; also out of scope pending one.

Seed:
1. Play-dough equivalent of "weave vs thread count": the base chemistry/product type (dough vs. silicone putty vs. glue-slime vs. drawing mechanism) is the real split, not the "non-toxic" claim or color count every listing leads with.
2. A barista-trainer persona would notice that "non-toxic" and "ages 3+" look identical across all four types on the box, but the actual risk and mess profile differs sharply by base chemistry: dough dries into an unusable lump in hours, putty lasts years sealed, slime stains/dries and sticks in hair, and drawing boards carry no compound risk at all.

Sources:
[wikipedia_play_doh] https://en.wikipedia.org/wiki/Play-Doh — water/salt/flour, wheat allergy warning, non-toxic/non-staining, borax anti-mold — fetched excerpt
[wikipedia_silly_putty] https://en.wikipedia.org/wiki/Silly_Putty — silicone PDMS non-Newtonian, bounces/breaks, lint/hair pickup, TheraPutty/Power Putty resistance grading — fetched excerpt
[wikipedia_slime_toy] https://en.wikipedia.org/wiki/Slime_(toy) — guar gum original base, PVA glue/borate crosslink modern base, dries/sticks in fabric or hair outside container — fetched excerpt
[wikipedia_magna_doodle] https://en.wikipedia.org/wiki/Magna_Doodle — magnetic stylus + bead board + sliding eraser mechanism — fetched excerpt
[wikipedia_etch_a_sketch] https://en.wikipedia.org/wiki/Etch_A_Sketch — knob-driven stylus scrapes aluminum powder, shake to erase, Pocket travel version — fetched excerpt
[wikipedia_toy_safety] https://en.wikipedia.org/wiki/Toy_safety — ASTM F963, CPSIA lead/phthalate limits, EN 71, Small Parts Hazard Warning Rule, LHAMA art-materials labeling — fetched excerpt
[wikipedia_acmi] https://en.wikipedia.org/wiki/Art_%26_Creative_Materials_Institute — ACMI certifies art-material safety via toxicology testing with Duke University — fetched excerpt
[crazyaarons_product_page] https://www.crazyaarons.com/products/crystal-clear-liquid-glass-thinking-putty — non-toxic silicone, ages 3+, choking-hazard small-parts warning, Liquid Glass stretches/breaks without bouncing — fetched excerpt
[acmi_org_ap_seal] https://www.acmiart.org/ — names the Approved Product (AP) Seal and Cautionary Labeling (CL) Seal — fetched excerpt

Branches:
- product_type → dough/putty/slime/drawing_board legs: each type's facts (chemistry, resistance, base, mechanism) are unrelated, confirmed across all five product-specific Wikipedia pages fetched.
- min_age_grading → toddler_0_2 leg makes effect/mixin-variant facets irrelevant: small-parts choking rule (wikipedia_toy_safety) applies to loose magnets/glitter/bead mix-ins specifically.

Noise (spec-sheet rows left out):
- "Made in [country] / origin" (Crazy Aaron's product page) — manufacturing provenance, not a buyer-expertise axis.
- Pack size / weight in oz (Silly Putty wiki, Crazy Aaron's page) — no two-sourced numeric range available this run; generic across all toy multipacks, not category-specific expertise.
- Color (single vs. multi-pack count) — cosmetic, doesn't change chemistry or behavior; price/pack-count-like, excluded per rule against price/pack filler.
- "Helps build hand strength" marketing line (Crazy Aaron's) — folded into putty_resistance_grade's why_experts_care rather than a separate facet.

Corrections: none yet.

Corrections (2026-10-26):
- Added facet `drawing_magnet_piece_containment` and wired it into the drawing_board and toddler_0_2 branches: the register's own sources (wikipedia_magna_doodle's loose "magnet shapes", wikipedia_toy_safety's Magnetix recall — one death, four injuries) documented a magnet-ingestion hazard no facet named.
- Re-sourced the ACMI AP seal claim: fetched acmiart.org, which names the "Approved Product (AP) Seal"; softened the facet/vocabulary wording to drop the unconfirmed "safe even if mouthed" scope that wikipedia_acmi never stated.
- Added an explicit scope exclusion for Kinetic Sand and Playfoam/foam-clay compounds in the Scope line above, rather than inventing a fifth product_type with no researched facet set.
- Reworded `min_age_grading`'s question/cold_start_question to name loose magnets and glitter mix-ins directly, so it no longer reads as a generic any-toy-category age question.
- Relabeled `dough_base_chemistry`, `dough_scent_or_sensory_additive`, `putty_effect_variant`, `slime_mixin_type`, `drawing_mechanism`, and `drawing_board_size_or_portability` from `source: listing` to `source: derived`, since each is backfilled by a title-keyword match, not a structured retail field.
- Added a vocabulary entry for `EN 71 / CE mark`, sourced to wikipedia_toy_safety's "EN 71 testing is required ... to carry the mandatory CE mark" line.