Bump Up is from Mark Savage, USPTA certified Tennis Director at Sportsplex in New Windsor, NY. Best for young beginners.
Have players spread out a safe distance on court and ask them to dribble the ball into the air, or 'bump up' 10 times. When they are finished, they should sit down in the court.
Next, ask them to Bump Up and count how many times they are able to do so within a 30 second period. Repeat, encouraging each to improve on their own personal records.
Finally, divide players into teams and repeat the first task (Bump Up 10 times). First team to have all of its players seated, wins.
It is up to you whether you want the 10 to be in a row or just 10 however they can get them!