Tickets range from 40 baht for standing room up to 500 baht for VIP seats, which includes English explanations of what's happening. You can buy tickets at the stadium or ask your hotel for help arranging them in advance. Note that some animal rights activists feel that forcing elephants to perform shows constitutes inhumane treatment. At the very least, don’t support the handlers who pull their elephants around the city and charge tourists 20 baht to feed them.