What is the meaning of 劃來劃去?
This is a spelling mistake, and should be written as 「划來划去」.
In Traditional Chinese, 「划」 means to row, to paddle, e.g. 「划龍舟」 (to row a dragon boat). 「劃」 normally means to delimit, to partition 「劃分」 or sometimes to plan 「計劃」.

小蝌蚪看見小鴨子跟著媽媽在水裏划來划去
The wee tadpoles saw the ducklings following their mother in the water, paddling away.


References:

萌典
國語小字典
教育部國語辭典簡編本
粵語審音配詞字庫