A different answer from the bigger small pets
A Roborovski hamster is the exception to the hours-out rule that applies to rabbits and rats. Robos are desert hamsters, tiny, astonishingly fast, and built to run enormous distances overnight on a wheel inside a large enclosure, which is where the great majority of their exercise should happen. Out-of-cage time for a Robo is enrichment and variety, not an exercise requirement, so think in terms of short playpen sessions of roughly twenty to thirty minutes, offered a few evenings a week, rather than a daily quota you must hit. A Robo who never leaves the enclosure but has deep bedding, a correct-size wheel, and plenty to explore is not missing out.
Read the individual hamster before scheduling anything
Roborovski temperaments range from tolerantly curious to completely opposed to being handled, and the hamster gets the deciding vote. A Robo who climbs into a mug or hide voluntarily, explores the playpen, and takes treats is enjoying the outing. One who darts in panic, freezes, squeaks, or throws himself at the playpen walls is asking to go home, and the kind answer is to return him at once and rely on in-enclosure enrichment instead. Never wake a Robo for a session, since these hamsters are most active late in the evening and being hauled out of a nest in daylight adds stress to an already nervous species.
Build a playpen a Robo cannot escape from
Free roaming is out of the question for an animal this small and fast, who can pass through gaps you would swear were sealed and vanish under appliances in seconds. Use a solid-sided playpen or a dry bathtub lined with a fleece, set up with tunnels, small hides, a sand bath, scattered seeds to forage, and a spare wheel if your Robo likes one. Move him between enclosure and playpen inside a mug or tube he walks into himself, keeping hands as transport of last resort, and supervise without hovering. Keep the room quiet, other pets out, and sessions in the same calm corner so the routine itself becomes familiar and less alarming over time.
Keep a brief note of what happens across the first few sessions, because Robo tolerance often grows slowly and it is easy to miss progress measured in seconds of calm exploring. If your hamster begins waiting near the door in the evening or enters the transport mug without hesitation, that is genuine evidence the sessions are working, even if he never becomes a hamster who enjoys being held in hands.
Put the real effort into the enclosure
Since most Robo activity happens at home, judge your setup by what the nights look like: a solid wheel large enough that the back stays straight, bedding deep enough for proper burrow systems, a sand area, and clutter to weave through. A hamster who is out of the nest all evening, running, digging, and foraging, is getting what he needs whether or not playpen sessions happen. Contact a veterinarian experienced with small mammals if you see a sudden activity drop, a wobble or tilt, wetness around the tail, or weight loss, because Robos decline quickly and hide illness until it is advanced. KinsLe Family Sharing keeps your Roborovski's shared profile and handling notes visible to everyone at home, so nobody treats him like a hands-on pet he is not.