Which hamster to get? (details inside)?

Well I dont know what robos are but i have three dwarfs and when you call their names they automatically wake-up and you could get 2-3 maybe even 4 and put them in a ten gallon fish tank and maybe with a attatch on wire cage for more exercise.But then again i have a long haired female hamster and she is active all night and you can easily wake her up during the day,but all hammys are nocturnal!Hamsters need a lot of attention from humans so you maybe should let the kids handle them coz rarely do hammys bite!My long haired hammy has never bitten and loves her aquariam with a upstairs wire cage!They need a lot of love and must be feed each day and given fresh cold water each day.Never keep your hamster in its ball for more then 30 min.