Go to Walmart, Target or some place like that. Get teams of 5 or so and send them off to get 10 items in a shopping cart, then set a time and place to meet and exchange carts. The first team to return all of the items to their appropriate place wins.
Few rules I realized afterwards:
Teams must stay together
Give a time limit for getting the original 10 items
Threaten the walking thing so you don’t get kicked out. I threatened that the first team to get kicked out had to buy ice cream for everyone else.
Good times, goes quick.