You have just got to find experiments they can do without close, one-on-one supervision and involving safe materials.

In each case, the project supplies safe material that encourages children to improvise and try out new social roles.

The exterior was already stucco, considered the safest material.

"They'll go into the materials safe to check it out."

That would accelerate the development of alternative safer materials.

Copper has been a good, safe and durable material for making drinking water pipes for many decades in Europe.

They turn the toxins in the carrion into safe material.

Composting done in a controlled way produces a safe material that can be used to improve land.

If possible, use only new cases constructed of safe materials such as metal, plexiglass, or some sealed woods.

It is one of the safest materials for containing horses.