Radical 10
Radical 10 or radical legs meaning "legs" is one of 23 of the 214 Kangxi radicals that are composed of 2 strokes.
In the Kangxi Dictionary, there are 52 characters to be found under this radical.
儿 is also the 14th indexing component in the Table of Indexing Chinese Character Components predominantly adopted by Simplified Chinese dictionaries published in mainland China. In addition, this radical is commonly pronounced ér among Simplified Chinese users as 儿 is the simplified form of ér. However, the meaning of 儿 as a radical is irrelevant to 兒.
Sinogram
The radical is also used as an independent Chinese character. It means child, and sometimes simply means erhua phonetically. 兒 is sometimes used to differentiate when it specifically means child and not phonetic use.