Huckle Buckle is fun
Limbo
Clothing relay race
Obstacle course
Tug of war
egg and spoon race (you can use water balloon for this as well just use a BIG kitchen spoon/ladle)
Centipede
WAter balloon toss with milk gallon jugs. Take milk gallon jugs rinse them out, and cut it so it resembles one of those wiffler things. Use these milk gallon jugs to toss the water balloons between them
balloon volleyball with no hands... (here's how you play it!)
Use a jump rope or rope and make a line on the ground. Make two teams on both sides of the line. Grab a regular air (not helium) filled ballon and blow it up.
Tell the kids that they have to sit on their hands, and have to use any other body part available to get the balloon over to the other side for a volley. (They can also scoot around, but they still need to stay on their hands ) You don't have to keep strict volley ball rules.. usually it takes about 3/4 hits to get it over the line... but its pretty fun
Obviously, you have to tell them not to elbow other team mates or head butt them, but this is great game with older kids, especially boys...
You can tell I have a boy, and also planned birthday parties at one time for a living.