Activity Time
 ~
   ~ Write the bigger number in the lower box and smaller number in
 ~ l''f  the upper box of the seesaw.
 ~                             22  35                                                16  10
          ------------------L-----------------
                                 43  29                                              11  31
          ------------------~-----------------
                               22  41                                                36  18
          ------------------,-----------------
                                                                I
                               25  42                                                20  30