Should a Demonstration require the use of a Bunsen burner or boiled water, there is the risk of burns and/or fire.
Ensure you use safety goggles and appropriate gloves if handling hot items or hot water.
If a burn occurs treat the effected area immediately by placing burn area under cold running water for at least 15 minutes. Seek medical help.
Ensure an appropriate fire extinguisher is available.
If necessary heat proof mats are used.
Handle liquid nitrogen with extreme care, there is the possibility of cryogenic burns. Ensure Personal protection (gloves and goggles) is supplied and used.