The Sam Houston Race Park Firework Extravaganza includes 12 live races and a performance by Team Ghost Rider that features four monkeys riding dogs and herding sheep (were hoping for marching-band formations, but the sheep arent always too cooperative). Then its time for the fireworks, one of the biggest displays in the city. Noon. 7575 North Sam Houston Parkway West. For information, call 281-807-8700 or visit www.shrp.com. $4 to $10.