They are playing a game to see who turns over the "greater" number
card (similar to the card game War).

Write the
numbers from 010 on the chalkboard or on a shower curtain. Divide
class into teams and give each team a fly swatter. Call out a number
and have the first team member “swat” the answer. Continue playing,
giving each team a point for correct answers. 
For math
homework, have children look for numbers in their home. They could
draw a picture of each item that shows a number and even write the
numbers that were displayed (clock, microwave, phone, house number,
etc.) 
Put counting
chips in a can, one for each child in the class. Have these chips
labeled with the numerals 120 (or the number of students in the
class). When it’s time to line up, have each child draw a chip from
the can and line up in numerical order. Later in the year, the chips
could be labeled multiples of five to practice counting to 100 by
fives or they could be labeled with number words.
