Birthday party games for 8-9 year old boys?

[Bridgette01]

Hello All, shortly I need to entertain a small group of around 5 or 6 boys for my sons 9th birthday party. It will be held at home and we have a fair amount of space inside and out available. How can I keep them entertained for a number of hours? I want to keep screen time to a minimum and have them outside as much as possible or inside being entertained while not running around out of control. I will be supervising them as much as possible. I have planned a few small ball games and a treasure hunt but thats about it. Any ideas would be greatly appreciated!!

Thanks,

Tony