I love this terrarium at The Magic Onions that uses only pebbles and moss. It's easy to put together and everyone will have fun adding cute little objects to make it theirs. Whether it's butterflies or dinosaurs it will be adorable when finished!
Visit Babble Dabble Do to find out how to weave on recycled plastic lids. It would be easy to adapt if you don't have exactly the same kind of lid as she does.