Can anyone tell me how to make a good pop up prop which is fairly cheap?
What type of pop up are you looking for? A zombie? Have you tried the "Deer Motor"? They are cheap but move real slow. The cheapest way is a rope and pulley system, but that takes a person to operate.
Hate to put it this way; but for the price of beer, food and makeup you can get the cheapest animated props out there.. "Relatives and Friends" been doing it for 15 years now and have gone through brothers; father; friends and last year my 9 year son stepped up