Set up a small compost bin or jar with food scraps, soil, and a few worms if available, checking in every few days to observe, smell, and gently touch (with gloves) how the contents change over time. Track the changes in a simple log, comparing what different scraps look like week to week.
What you need
- a small compost bin or large jar
- food scraps
- soil
- gardening gloves
How to do it
- 1Layer soil and vegetable scraps into the bin or jar, adding a splash of water to keep it slightly damp.
- 2Check in every few days, wearing gloves to gently stir and observe the contents.
- 3Note or sketch what's changed since the last check -- colour, smell, texture, whether pieces have broken down.
- 4Keep the log going for a few weeks to watch the full process unfold.
Variations
- If an outdoor compost setup isn't possible: a sealed clear jar on a balcony or windowsill works as a smaller, contained version.
- How it ends: using the finished compost in a garden or pot plant gives the project a genuinely useful conclusion.
💡 Parent tip
Let mild disgust be part of the fun -- reacting with genuine curiosity rather than distaste to the smell and texture changes keeps the science framing intact.
What your child develops
- Decomposition science — direct, ongoing observation of a real natural process
- Environmental awareness — understanding where food scraps go builds early sustainability thinking
- Long-term observation and recording — a multi-week log builds patience and documentation skill
Safety notes
- Always wear gloves when handling compost contents and wash hands thoroughly afterward.
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