I do not believe this previously posted  statement  is true "If you had "any" income from babysitting in 2014 regardless of the amount, you need to report that income." 

According to the below source you don't have to file if self employment income is less than $400. Of course it depends on other income sources but if  there is only self employed income of less than $400 there is no reporting requirement.

Publication 501 (2021), Dependents, Standard Deduction, and Filing Information

Table 3. Other Situations When You Must File a 2021 Return