chotto or sukoshi if you are talking about the type of little where you say 'a little bit'
if you mean the opposite of small, then it's something else entirely.
You may say 'imouto.'
hiko
tora no hotondo
chisai kitsune
Japanese just use kodomo as in child
'Little fire' translates toå°ã•ãªç‚Ž (chiisana honoo) in Japanese.
小熊(koguma)
The term 'little sister' could be translated as 'imouto', to say 'my little sister' you could say 'watashi no imouto'. But remember, if you are going to refer to someone else's little sister, you must say 'imouto-san', 'san' being the honorific, which are a key element of the Japanese language and etiquette.
小狼 Shō ōkami
You may say 'imouto.'
男の子 (otoko no ko)
You may say 'otouto.'