What activities would you suggest in Kenya?

I'll be hosting some relatives from the states in a month, and I am keen on finding some hidden gems. So far I'm aware of the shooting ranges, gp karting, hiking, paintballing, outdoor painting, bungee jumping, roller/ice skating, zip lining, sky diving, hot air balloon, game drives, bowling and gaming lounges e.g village market.

Places in Nairobi for the most part but I'm open to trying out places outside the capital. Any input is greatly appreciated.