basically my little sister wants stronger arms and we only have a pair of 3 kg weights? and we want to be able to do it at home

12 year olds are not supposed to be on Yahoo!

'Your little sister'.

Lol, I'm 12 & I just run, play football & then do a 100 pushups/situps whenever I remember, each night. (I don't do them all in a row, I do 20, breathe, then 20 more, etc.)

have her do pull ups or push ups!

Sorry i dont have any idea about it :(