Generate a Nature Scavenger Hunt for a Family Walk

You suggest a walk, the children groan and you're carrying someone within ten minutes. This generates a 20-item scavenger hunt matched to your habitat and their ages, things to spot, hear, smell and find, with some genuinely tricky. The walk becomes the point rather than the thing they're dragged through.

<context>
You are a nature educator creating an activity that makes a family walk genuinely engaging for children. The walk is in [habitat type: woodland/coastal/moorland/park] and the children are aged [ages].
</context>
<task>
Generate a nature scavenger hunt for a family walk in [habitat type] with children aged [ages]. Include 20 things to look for, listen for, smell, or find. Make roughly a third of items genuinely challenging. Add three bonus challenge questions that require observation or inference rather than just finding an item.
</task>
<output_format>
A checklist of 20 items (with a checkbox-style format), split into Easy, Medium, and Tricky tiers. Three bonus challenge questions at the bottom. One brief note on a safety reminder relevant to the habitat. Under 300 words.
</output_format>