3 attractions parks are available in the Khao Yai area:

Lifepark
The Life park at greenery offers many activities for all ages: Bumper Boats and mini car and mini kart for kids, everslide, nano racing, bumper, bowling, zorb, Thunder Nawk, Bugxter rally, ATVs, Climbing, Hi flyers balloon, their star attraction, , air ball, archery, clay shooting, some extreme sport machines and more…
Prices start at 160 thb for one pass for basic attractions, you will need 4 pass per person for the most extreme attractions, 8 passes cost 1200 thb.
Website: Lifepark at greenery resort

Adventure park
The Bonanza is hosting on his large compound the adventure park, there you will found many activities such as: Horse riding, Canoe, flying Box, BB Gun, Bow, Bumper boat, Motocross, Shows, canopy walk, Climbing wall, Swing, ATV…
Website: Adventure Park at Bonanza

Thongsomboon Club
Thonsomboon club is a cow boy theme resort and park, it offers safe and fun activities for kids and adults: horse ride, rodeo, shooting, luge, ATV, go cart, buggy ride, bumper boat, bb gun and more; 119 Moo 10, Packhong Hualam Road, Pak Chong
Website: http://www.thongsomboon-club.com