in reality i am researching to invent a new generation of speed bumps which must be proper for using in my country,IRAN,and finally my research result shown the best speed bumps is something which works with air,it is an airbag and works by compressing air and the air goes along a pipe as a link and join back to the air bag in another part!at first ,what is your idea about it?will it work well as a teory?and the second i am looking for a proper thing to use as air bag,in my opionion a rubber would be suitable which has a metal net in it,WHAT IS YOUR IDEA?
Look for a local company that bronzes baby shoes. Maybe they can help you. As well places like Michaels have casting resin that will allow you to encapsulate most anything in a hard shell of plastic.
Usually, if there is a fire at a school, and alarm goes off automatically, so the pulling of the fire alarm is very unnecessary. However, pulling a fire alarm when there is no fire is a federal offense.