Use these colorful cards to review tens and ones with numbers through 50. Pass out the cards, one to each student. (There are 30 cards in this set.) The first student reads their card. The student with that card answers and asks the next question. For example, "I have 23. Who has 1 ten and 3 ones? I have 13. Who has 3 tens and 3 ones?" This is a great circle game, perfect for review, rainy day, or a quick extra few minutes. Have more than 30 students? Partner your lower kids up so everyone is successful!