I know Tama-Mini pesonally and she is not new at tamagotchi. She has had her tama for at least 2 yrs. Any way, I know that you have a and those type of tamas do cart-wheels when they get bored. No need to worry.
i just got my v3's yesterday, and they are still on the toddler phase. they roll too! the toddler i have on my 2 v3's, Mizutamatchi, he has a very expressive face, smile when happy (like rolling) and a frown when he looses a game or gets a time out.