Babysitting Income and filing taxes on it...?

I babysit my neice and they pay me 50.00 a week...they have paid me a total of 1800.00 this year. My question is...she is filing it on her taxes as childcare expense so do I need to file this as well? This is my only income...my hubby works full time and we always file jointly. I didn't know if this was even enough money to worrry about filing on. Thanks for your help!