Kedublock cuts the top off of a plastic bottle, puts in a tree wood disk as a stopper, and embellishes with a pretty piece of twine to make a bug observatory. She burns in tiny plastic oxygen holes for air.
Good for ages 11 and up.
Get the instructions here:
http://kedublock.blogspot.com/2012/09/insect-observatory.html
Busy bee kids crafts uses the whole bottle adding sand and plants.
Get the instructions here:
http://www.busybeekidscrafts.com/the-bug-jug.html