Ages 8–10 · Est. 30–45 minutes · 2–6 players

Mars Greenhouse Registry

Unlock the correct planting record for the Mars greenhouse.

Six clues, three hint levels each, and a paper-only finish. No locks, apps or cutting required.

Mars Greenhouse Registry: Seed desk: Find the exact word SEED, reading RIGHT only. Reject near matches and reversed words. Copy the digit immediately after it.

Your mission

The greenhouse desk mixed three caretakers’ seed records with a cancelled delivery. Match each caretaker, decode the seed note and check the planting slots. Collect five named badge digits and use the final sheet. Every clue is on the table; ask the host for one hint at a time.

Set up in one room

Print one player pack and two record sheets per team. Keep the host answers and all three hint levels with the adult.
Keep every clue as a full sheet at one table. Put the final sheet face down until all five results are recorded. Nothing needs cutting, folding or hiding.
Give each child a pencil. Choose a reader, recorder and checker, and swap jobs after each clue. Use one team for 2–4 children or two teams for 5–6.

Materials

6 player sheets and 2 prop sheets per team
One pencil per child
One adult host with the answer and hint pages

Designed ages and estimated time have not yet been calibrated in a live child playtest.

See all six player clues

These are the actual figures from the printable player pack.

1. Seed

Seed desk: Find the exact word SEED, reading RIGHT only. Reject near matches and reversed words. Copy the digit immediately after it.

Read this clue in text

Find SEED; only read to the RIGHT. S E E X 8 A B C D E E S 2 A B C S E E D 8 D E F C A M P 9 S U N Answer = digit in the next square after the word.

2. Keeper

Keeper desk: Each person has ONE different item. Use all four NOT rules. Find Luis's item and copy its digit.

Read this clue in text

Pea digit 2 Bean digit 5 Corn digit 8 People: Ava, Jae, Luis Ava does NOT have Bean. Jae does NOT have Corn. Jae does NOT have Pea. Luis does NOT have Corn. Find Luis's item. Each item is used once.

3. Delivery

Delivery desk: A return entry lost its amount. Use the opening and closing stock to find the missing return. Apply DONE entries; ignore the CANCELLED plan.

Mars Greenhouse Registry: Delivery desk: A return entry lost its amount. Use the opening and closing stock to find the missing return. Apply DONE entries; ignore the CANCELLED plan.

Read this clue in text

Opening stock: 8. Closing stock: 13. Received: +3 DONE Planned: +7 CANCELLED Issued: -3 DONE Returned: ? DONE Missing return = ? units. Ignore cancelled plans.

4. Plot

Plot desk: Read the letter at each coordinate, in order. Letter = column; number = row. Convert the complete word using the printed table.

Mars Greenhouse Registry: Plot desk: Read the letter at each coordinate, in order. Letter = column; number = row. Convert the complete word using the printed table.

Read this clue in text

Columns: A, B, C, D. Rows: 1, 2, 3. 1 B S H L 2 G K E R 3 M Q T D SEED = 8 BEAM = 1 DOCK = 4 READ COORDINATES IN ORDER: B1 > C2 > C2 > D3

5. Weight

Weight desk: Every parcel has the same whole-number weight. Remove loose units, find ONE parcel and check the second rule.

Read this clue in text

3 parcels + 1 loose units = 7 units 2 parcels + 3 loose units = 7 units One parcel = ? units. Whole numbers 1–9. All parcels have equal weight.

6. Final

Compare each record with ALL five badge results. Find the one record matching every column. Copy its complete code, including the first zero.

Read this clue in text

C1=Seed / C2=Keeper / C3=Delivery C4=Plot / C5=Weight Record A: 02507 C1=9 C2=2 C3=5 C4=8 C5=2 Record B: 02517 C1=8 C2=2 C3=5 C4=8 C5=2 Record C: 02527 C1=8 C2=3 C3=5 C4=8 C5=2 Record D: 02537 C1=8 C2=2 C3=6 C4=8 C5=2 Record E: 02547 C1=8 C2=2 C3=5 C4=9 C5=2 Record F: 02557 C1=8 C2=2 C3=5 C4=8 C5=3