How do I can I convince my parents to let me have an iPod??? Please help me!?

I REALLY want an iPod touch, but my mom really doesn't like it when people buy for me and she says I should wait till CHRISTMAS AND IT'S JUNE.I have been dreaming of an iPod touch and it's seriously all I think about. So I have been babysitting but my mom has been TAKING HALF OF MY MONEY I HAVE BEEN MAKING so it's hard to make money.so how do I convince my parents or my grandparents to get me one? Oh, and also, my grandma was going to get me one but my mom said I have to wait!!!!!!!!!! UUUUUUUGGGGGGHHHHHNNNNNH!!!!!!!!!"""""