This is a fun activity to use at the end of the year, for a substitute, for a filler, for a party, etc. This activity can be used at the end of 2nd grade, for 3rd and 4th at any time, and for fun and remedial work for 5th grade. There is estimating, sorting, greater than, less than and equal, adding, and subtracting. I used this every year for my 4th graders and they loved it. I bought the M & M's at Costco in bulk.