How can I earn about $120 in 3 or 4 months REALLY easily?

try doing something out of the ordinary around your house(cleaning the grout in tile, picking weeds in lawn etc) and ask to get paid for them. explain to your parents that your are saving up for something special. you can also try a dog walking business where u walk peoples dogs a certain amount of times a day at certain times everyday and they give u a weekly salary of maybe 20-25$$. hope this helped!!