I was just wondering if there is a way to tell how old my frogs are? Like I said befor they were bought by my father for my children for there birthdaywithout him talking to me about it first so I am really trying to do my best at this. They are cool and I really enjoy watching them. I was told they they are all about 4 months old but none of them are the same size. I was just wondering of there was a way to tell?