From the given pictograph answer the following:

In  [[1]] and [[2]] games the number of students participating is the same.

From the given pictograph, each sign stands for 17 students.

It is clear that the number of students participating in knock the stuffed toy game is $17\times 3=51$

The number of students participating in estimating weight game is $17\times 3=51$

Hence, In knock the stuffed toy and estimating weight games, the number of students participating is the same.