Recyle: kids and staff bring in their bottle from home and the teachers collect them and send them to a local recycle center to donate
If you are interesting in finding some great ideas for children's tree art projects, then the best website for you to check out would be Activity Village. They have some of the best ideas!
portable bathroom
nothing
I think it's more accepted to hyphenate it.
Some creative melting bead ideas for crafting projects include making keychains, coasters, bookmarks, and 3D sculptures.
How the heart works.
the taj mahal
you can do something to do with recycling or do a fundraiser.
There are lots of great ideas for community service projects for teenagers. Here is a list of ideas for you to consider. http://lancaster.unl.edu/4h/serviceideas.shtml
Class projects involving volcanoes can be a great idea as they allow teaching of some geography, geology and physics. The website called Storm The Castle has some great ideas.
Some creative stair ideas for home design and renovation projects include floating stairs, spiral stairs, glass stairs, and under-stair storage solutions.
One can find ideas for mechanical projects by going to the Science Buddies website. The website has a number of ideas for mechanical engineering projects.