Here's an oldie, but a goodie.
Each player needs a handful of place value blocks, 10s and 1s. Players will also need a place value mat and a shared set of 2 dice.
First player rolls the dice, adds the sum, and gets that many ones for his board.
Each player gets a turn to do the same. I ask kids to play in groups of 2 or 3. Larger groups work, but then the kids spend too much time waiting for a turn instead of using the manipulatives.
On the second turn, some children will have 10 or more in the 1s section of their place value mat. They must trade 10 ones for a 10s rod any time they have more than 9.
Continue play until one player wins by reaching 50 first.
