Stop the lawyers, not the rides!
You could talk about the innovations in safety - upstop wheels, chain dogs, etc. Most good coaster books have lots of good info on this.
Or you could talk about the diversity of rides today compared with what we had pre-1970. Or even pre-1990. I would say that all the "types" of steel rides (easily found on rcdb.com) and the types of wooden rides (out-n-back, twister, free-form, terrain) all qualify for their own sub-topics, with demonstrations. You could even stick pictures in there if you wanted to be really fancy (and get an A!).
He let the contents of the bottle do the thinking; can't shake the devil's hand and say you're only kidding.
*** This post was edited by flickchick on 6/3/2002. ***
Here's your outline:
1. Coaster history-- start with the original Russian "ice slides" of the 15th century, to the French Grooved Track which appeared in 1817 and finally La Marcus Thompson's Switchback Railroad that opened at Coney Island on June 13, 1884 (the first modern roller coaster)
2. The evolution of wooden coasters.
3. The evolution of steel coasters
4. Coasters of the future.
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