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Grass Pass

Family time is back! powered by AI.

Your local park, turned into an adventure. Grass Pass uses AI, real park maps and recent wildlife sightings to write a scavenger hunt made for you or your kids.

Pick a park and who's coming, from little kids to teens and adults. In about 30 seconds you get one printable page, plus today's weather and tips for the trip. Print it, grab a pencil, and leave the phone at home.

Create your pass now

Find a park

For example: Allen TX, a US ZIP like 75013, or Arbor Hills Nature Preserve.

Always free · 1 pass a day, or Sign in for 5 a day + feedback

  1. Step 1: Park
  2. Step 2: Explorer
  3. Step 3: Make it

Pick your park

How far to look

Measured in a straight line from your place.

Type a town, ZIP or park name above, or use your location.

AI-generated illustration: a child kneels in a wildflower meadow with a paper checklist and a pencil, looking at a butterfly

AI illustration

Grass PassAges 6–10

Oak Point Park and Nature Preserve

Plano, TX · real pass, made Oct 6, 11:41 PM CDT

  • Count the 2 cold water spots that bubble up from a spout.2 on the park map · OpenStreetMap
  • Point to the 8 paths that carry you across water.8 on the park map · OpenStreetMap
  • Check the water that glitters like a mirror.3 on the park map · OpenStreetMap
Grown-up's stub · answers & safetyView pass

What's a pass?

Proof in every clue.

Every clue comes from a real, dated source, listed on the grown-up's stub. So nobody spends 40 minutes hunting for a heron that flew off in 2019.

Oak Point Park and Nature PreserveTuesday, Oct 6 · Ages 6–10

Find these 8 things. Spot one? Tick its box!

Part 1, Park Finds:

  1. Find 1: Count the 2 cold water spots that bubble up from a spout.(2 on the park map · OpenStreetMap)
  2. Find 2: Point to the 8 paths that carry you across water.Stay with your grown-up near water. (8 on the park map · OpenStreetMap)
  3. Find 3: Check the water that glitters like a mirror.Stay with your grown-up near water. (3 on the park map · OpenStreetMap)
  4. Find 4: Where are the rocks and twigs sticking out of the shallow water?Stay with your grown-up near water. (on the park map · OpenStreetMap)
  5. Find 5: Who am I? I have a cover on poles and tables for a meal.(1 on the park map · OpenStreetMap)

Part 2, Wild Finds:

  1. Find 6: Spot a tree with bumpy fruit that is yellow-green.Look, don't touch. Never eat wild berries or fruit. (seen once since Sep 22 · iNaturalist)
  2. Find 7: Peek at a vine with large, intricate purple flowers.Look, don't pick or eat. (seen once since Sep 22 · iNaturalist)
  3. Find 8: Which bug is green with blue on its tail end?Look, don't touch. Stay with your grown-up near water. (seen 2 times since Sep 22 · iNaturalist)

Part 4, Find This Spot:

Map of Oak Point Park and Nature Preserve drawn from OpenStreetMap, north is up. START is at a parking lot; the X is about 170 m south-east of it, and a dotted route follows the paths. Landmarks on the map: Restrooms.RestroomsSTARTN50 m (160 ft)

Find This Spot

“I have poles and a roof. Families meet here to share a birthday meal.”

Part 5, October monarch box:

October special: monarch butterflies

10 monarchs seen Sep 22-Oct 5 vs 64 in 2025

Part 6, The grown-up's tear-off stub:

For the grown-up: answer key

  1. 1. Drinking fountains
  2. 2. Bridges (Rowlett Creek Trail, Oak Point Park & Nature Preserve, High Meadow Trail)
  3. 3. Ponds or lakes
  4. 4. Creek or stream (Rowlett Creek)
  5. 5. Bench
  6. 6. Osage-orange (Maclura pomifera)
  7. 7. Purple passionflower (Passiflora incarnata)
  8. 8. Rambur's Forktail (Ischnura ramburii)

Safety. Look only: don't pick, eat, catch or chase anything on this pass. Some things seen here are left off for safety.

Part 3, Lucky Finds (not on this pass):

Not on this pass

  • Lucky Finds: not on this pass. On Tue, Oct 6, the server that made it had no SerpApi key, so it could not read visitor reviews.
  • 1 clue removed: gave away the answer or broke a rule.

Where this came from

  • Map: © OpenStreetMap contributors, checked Oct 6, 2:02 AM CDT.
  • Wildlife: iNaturalist, research grade, within 1.5 km, Sep 22 to Oct 6.
  • Clues: gemma-4-31B-it (open model, Apache-2.0), made Oct 6, 11:41 PM CDT.
A real pass: Oak Point Park and Nature Preserve, Plano, TX, made Oct 6, 11:41 PM CDT from that day's data. Shown as printed; map drawn with today's map code. See the whole pass

  1. Park Finds

    OpenStreetMap

    On this pass: Finds 1–5

    Hoops, bridges and playgrounds pulled from OpenStreetMap. Code adds real counts, like “8 bridges.”

  2. Wild Finds

    iNaturalist · last 14 days

    On this pass: Finds 6–8

    Real birds, bugs and blooms photographed within 1.5 km of the park in the last 14 days. Gemma quotes the source for each find, and code checks it word for word.

    Safety built in. Venomous snakes, poison ivy, stinging bugs and more (71 risky groups in all) are never printed. Every Wild Find carries a look-only safety line, like “look, don't touch.” On this pass, 5 nearby sightings were left off for safety.

  3. Lucky Finds

    Google reviews via SerpApi

    When the data has it

    Not on this example: see the stub’s “Not on this pass” list

    Maybe-sightings, like dogs or bikes, mentioned in at least 3 Google Maps reviews from the last 2 years. SerpApi counts them. No proof? The pass leaves them off and says why.

  4. Find This Spot

    OpenStreetMap + Gemma

    On this pass: under the finds

    Code draws a simple map with a START and an X. Gemma writes a riddle to help the kids find the spot.

  5. October monarch box

    iNaturalist · Sept 15 to Nov 15

    On this pass: after the map

    Code counts nearby monarchs from the last 14 days versus the same days last year. It prints the real number, even if it is zero.

    Sep 22–Oct 5, 2026
    10
    Same days, 2025
    64

  6. The grown-up's tear-off stub

    Code-written

    On this pass: below the dashed line

    Tear it off and keep it: the answers, the safety notes, what's missing and why, and every source with its date.

Explore

See a real pass, right now.

Example passes for parks near Dallas, made from live data for ages 6–10. Tap one to open it; no sign-up needed.

Example passes from live data (dates on each card)

Photos: Arbor Hills Nature Preserve (trail vista) by Robert Nunnally (March 2008), Sunday morning walk (Celebration Park, Allen, Texas, November 20, 2011) by Robert Nunnally (November 2011), Connemara Meadow (May 2, 2015, during the monthly bird walk) by Robert Nunnally (May 2015) (CC BY 2.0) · Dallas Texas - HCP - September 21, 2022 - 007 - White Rock Lake by Vulturesong (September 2022), Rowlett Creek in Oak Point Park, Plano, Texas, USA by Jackilometresan (April 2021) (CC0 1.0). Photo credits and licences

How it works

  1. Data in

    Step 1: Pick a park & age

    Type a town, ZIP or park name, or tap Use my location. Then pick 4–6, 6–10, 10–13 or 13+ (teens and adults): it sets how many clues and how hard.

  2. Data in

    Step 2: Real park map

    From OpenStreetMap: what is mapped inside the park.

  3. Data in

    Step 3: Wildlife sightings

    From iNaturalist: research-grade sightings within 1.5 km, last 14 days.

  4. AI processing

    Step 4: Safety filter, by code

    Code removes 71 groups of risky species, like fire ants and poison ivy, before the AI sees the list.

  5. AI processing

    Step 5: AI builds the hunt

    Gemma writes, code checks. Gemma 4 picks a fair mix from the park’s real map and 14 days of nearby sightings, then writes the clues. Code checks each one against its source. Usually 10–30 seconds, up to about a minute and a half on a slow evening.

    • Reading the park map…
    • Checking what people spotted…
    • Writing clues…

  6. AI processing

    Step 6: Code checks every clue

    A clue that breaks one of 26 hard rules (proof quote, name leaks, numbers, safety) is removed.

  7. Adventure out

    Step 7: Print the page

    One black-and-white Letter page: the kid’s pass on top, a tear line, and a grown-up stub with the answers and sources.

  8. Adventure out

    Step 8: Hide the phone

    Phone away. Kids tick off finds with a pencil while you keep the stub for hints (and sanity).

The problem

Why “Find a pinecone” fails.

Generic scavenger hunts fail because parks aren’t generic. A manicured city park has basketball hoops; a rugged nature preserve has butterflies. That’s why Grass Pass builds every adventure from scratch using your park’s exact map and the last two weeks of local wildlife sightings.

See the difference for yourself with these two Allen, TX parks:

Connemara Meadow in spring: a field of yellow wildflowers with tall grass and trees behindPhoto: Robert Nunnally, CC BY 2.0

Connemara Meadow

70species spotted nearby in 2 weeks

0playgrounds, courts or shelters

Wild hunt

So its pass is wild: birds, bugs, blooms.

A paved walking trail curving through autumn trees at Celebration Park in Allen, TexasPhoto: Robert Nunnally, CC BY 2.0

Celebration Park

25soccer fields, plus 6 courts

0recent wildlife sightings

Built hunt

So its pass is built: hoops, nets, a shelter.

Measured Oct 5, 2026: iNaturalist (research-grade sightings within 1.5 km, last 14 days) and OpenStreetMap (features mapped inside each park).

Print the pass. Pocket the pencil. Leave the phone.

Free, one printable page, written for the park across the street, not some park somewhere else.

Make a free pass