We learned how to pick a partner. This is the same method that The Sisters teach in their Daily Five book. (Students stand, raise their hand, make eye contact, walk up to the person and ask them to be their partner -My favorite part, they can only say, "Yes, I would love to be your partner, Thank you!"
I ask my students to bring in real money to use for math time. This money goes home with them at the end of the year. I have them bring 4 quarters, 10 dimes, 10 nickels and 20 pennies. These are stored in their tool kits which is a pencil box with all their math tools inside. (clock, ruler, tens/ones cubes, etc.)
I store all the tool boxes on the shelf. I write their student number with a sharpie on the side so they can easily pick out their own.
How to Play: Students combine their 20 pennies together to make a "bank". Student 1 rolls the die. They take the number of pennies that matches the die. When the bank gets low they must have the exact number or lose a turn. This is pretty easy but they like it and it works on taking turns and working well with a partner.