Materials that might otherwise be discarded can be pressed into service as learning tools.
For example, a revealing activity you can do in the classroom or at home is our "Make a Mini Greenhouse out of a Recycled CD Case." In about 10 days your radish seeds will become well-developed seedlings, with the entire plants visible, including root systems.
Key Concepts: Each plant part plays a role in its growth and development. Under the right conditions, a new plant will grow from a seed. Roots take in water and soil nutrients and green leaves are associated with making food from sunlight. (Adapted from California State Academic Standards, grades K–3.)
Estimated time: Soak seeds overnight. 20 minutes to make mini greenhouses. 10 days of care and observation.
To see radish plants growing from seed, watch our time-lapse video (38 seconds).