Back view of package
Instruction sheet + misc
Size comparison
Tamago and Nano
Music Star and Nano
Really long tab
Quick review: They are really really small. I do not have a mini so I can't compare the gameplay and size between both. There are no status menu so you can't see the hungry and happy bars. So far there are only meal(rice), snack(candy) and game menus available. They also do not get hungry all that much compared to the baby stage of Tamago and Music Star.