Woodland Terrarium. I love the idea of incorporating nature into the classroom in very real ways - instead of just pictures of plants and animals, have real plants and real animals. Having writing utensils and paper available encourages literacy and observation skills.
How to Make an Ecosystem in a Bottle
This miniature ecosystem has been thriving in almost complete isolation for more than 40 years. It's been watered just once in that time. The original spiderwort plant has grown and put out seeds. As it has access to light it continues to photosynthesize, the water builds up on the inside and "rains" back down on the plant in a miniature version of the water cycle. As leaves die they fall off and rot providing carbon dioxide and nutrients for more plants to grow
DIY : un jardin d'eau pour votre maison
Terrariums are a fun project to create. All you need is an interesting glass container with or without a lid, some pebbles or gravel, 1-5 petite plants or succulents, moss or sand and potting soil.