more than a first-grader
50
90 to 110 pounds
'bout 58 pounds to 72 pounds
No, but it really depends on the height. For the average third grader 90 pounds would be way too much, but if you are extremely tall then perhaps 90 pounds is just right for you.
120
50
0.5stone
10000000 pounds
About 80 TO 110
1kg
50 to 70 pounds
A lot!
about 75-100 pound if you are the right hight