Scope: Pogo, Stilts & Balance Toys (supplies > play > outdoor-play-structures > stilts) — spring-loaded pogo sticks, hand-held/strap-on/spring walking stilts, and static balance toys (hopper ball, floor balance beam, inflatable wobble platform). Excludes balance bikes (ride-on/cycling category) and fitness balance/wobble boards for adults (covered by the separate `balance-equipment` leaf under supplies > active).

Seed:
1. Stilts equivalent of steel_hardness: jump_mechanism (coil spring vs. composite leaf spring vs. air/hydraulic) — the one spec that is literally one side of the "jump height vs. beginner stability/cost" trade-off, same role as HRC on the edge-retention-vs-toughness scale.
2. A backyard-toy buying-guide specialist's first notice: the marketed age range and the real rated weight capacity routinely disagree — a toddler-age foam/bungee hopper is rated for adult weight (no real spring to overload), while a "9 and up" spring pogo stick can bottom out well under that; a novice shops by the age on the box and misses the number that actually governs safety.

Sources:
[wikipedia_pogo] https://en.wikipedia.org/wiki/Pogo_stick — mechanism (pole/spring/footrests), Vurtego/Flybar/BowGo jump higher than coil spring, Xpogo extreme height — fetched excerpt
[wikipedia_stilts] https://en.wikipedia.org/wiki/Stilts — hand-held (can/bucket, pole) vs. strapped peg stilts, materials, spring/jumping stilts = powerbocking — fetched excerpt
[wikipedia_spacehopper] https://en.wikipedia.org/wiki/Space_hopper — rubber ball ~60-70cm/24-28in, two handles, valve-inflated — fetched excerpt
[wikipedia_toysafety] https://en.wikipedia.org/wiki/Toy_safety — ASTM F963 is the US toy safety spec, CPSC requires it in practice — fetched excerpt
[fb_maverick] flybar.com/products/foam-maverick-pogo-stick-1-for-48-80lbs-ages-5-to-9 — ages 5+, 40-80lb — fetched excerpt
[fb_slingshot] flybar.com/products/slingshot-kids-pogo-stick — 40-180lb jumpers, thermoplastic pegs — fetched excerpt
[fb_v4] flybar.com/products/v4-pogo-stick — air pogo, adjustable pressure, 75lb+, aluminum/steel, jumps much higher than traditional — fetched excerpt
[fb_master] flybar.com/products/flybar-foam-master-pogo-stick — ages 9+, foam-wrapped metal frame — fetched excerpt
[fb_waddle] flybar.com/products/waddle-foam-pogo-jumper — ages 3+, no real spring, up to 250lb (adults ok), grass OK per FAQ — fetched excerpt
[fb_pogo_pals] flybar.com/products/pogo-pals-bouncy-hopper-ball-indoor-outdoor-kids-ages-3 — ages 3+, anti-slip base, CPSC compliant, Small/Medium sizes — fetched excerpt
[fb_beam] flybar.com/products/balance-beam-portable-gymnastics-beam — 4ft foam-core vinyl, anti-slip, ages 4+, two beams attach together — fetched excerpt
[fb_bullseye] flybar.com/products/bullseye-balance-platform-red-yellow-and-blue — inflatable, up to 3 kids at once — fetched excerpt

Branches:
product_type=pogo_stick -> ask jump_mechanism/frame_material/performance_class, drop stilt/balance facets — supported by wikipedia_pogo's distinct spring/pole mechanism vs. wikipedia_stilts' attachment mechanism.
product_type=stilts -> ask stilt_style/attachment/body_material/height, drop pogo/balance facets — supported by wikipedia_stilts' Types section (hand-held, peg, spring).
product_type=balance_toy -> ask form/size/material/grip/rider_count, drop pogo/stilt facets — supported by fb_pogo_pals vs. fb_beam vs. fb_bullseye being three different mechanisms (ride, walk, stand-as-group).
rider_weight_band=toddler_light -> drop performance_class — a toddler-tier product is never the extreme-performance tier (fb_waddle, fb_master contrast).
rider_weight_band=teen_adult -> ask performance_class — only teen/adult-weight products come in a high-performance tier (fb_v4).

Noise (spec-sheet rows left out, not facets):
- Color/pattern options (Maverick, Beam, hopper balls) — cosmetic, not expertise.
- LED light-up variants (hopper balls) — cosmetic add-on, not a category-defining spec.
- Pack size / bundle count (balance beam 1 vs 2) — a retail SKU detail, not a product attribute.
- Warranty length (Flybar's "1-year happiness guarantee") — store policy, not product spec.
- Character/theme (monkey, fox, unicorn Pogo Pals) — cosmetic licensing, not expertise.
- Price — excluded per rule (price is never a facet).
- Balance bikes appearing alongside "balance" products in Flybar's catalog — different mechanism (pedal-less bicycle), out of scope for this leaf.
- Drywall/construction stilts and digitigrade/articulated costume stilts (wikipedia_stilts Types) — professional/costuming tools, not consumer play toys; excluded from stilt_style values.

Corrections (2026-10-26):
- Removed `rider_weight_band`'s toddler_light/teen_adult branches on `performance_class` (contradicted `product_type`'s own unconditional/irrelevant branches for that facet; no scoped-branch mechanism exists in schema, so removed rather than invented).
- Added `jump_height_range` facet (numeric, ft) under the pogo_stick branch, sourced from fb_v4 ("2 ft to 6 ft... up to 8 ft") and fb_slingshot ("over 5 ft high"), re-fetched and grepped fresh; added to pogo_stick's then_ask and stilts/balance_toy's makes_irrelevant.
- Added `wikipedia_en71` reference and cited it (plus a new wikipedia_toysafety supports line) for `governing_safety_standard`'s `en71_eu` value, which previously had no citation containing "EN 71"; re-fetched wikipedia_toysafety fresh and confirmed the sentence is present.
- Reworded `rider_weight_band`'s age-cut-point backfill_note to state explicitly it is an editorial default, not a sourced figure, and that a stated weight always overrides it.
- Relabeled `stilt_attachment_method` source from `listing` to `derived` (its own hint already said it is inferred from stilt_style, not read off a field).
- Reworded `hopper_ball_size_class`'s backfill_note to flag `large` as the thinner-evidenced case, since the only cited brand page (fb_pogo_pals) sells Small/Medium only.
- Rejected: Part F's "no analogous size facet for Bullseye's 5.5ft platform diameter" and Part E's "Bungee not in vocabulary" — neither was in Required fixes; left as-is.