Quantifying with stones - this is a really simple idea for counting. Make sure you have the exact number of stones, that way you have a control of error (this child will be able to do the activity themselves and know if they have made a mistake).
For practice counting and assigning the # to the amount. Do again and again by sweeping up the snowflakes (or whatever is used) and dropping them where they fall. (Although if it's random there might be two of the same number in which case you'd have to have more clothespins.)