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Rabbits tend to thrive on routine. The best way to encourage your rabbit to play with you is to have regularly scheduled playdates.  Rabbits are generally the most active early in the morning, so this might be a good time to play with them if you're able. If not, a lot of rabbits are also active towards nighttime. Be careful when initiating playtime. Rabbits prefer to be left alone when eating, using the litter box, grooming themselves, and sleeping. If you notice your rabbit engaging in these behaviors, let him finish before initiating play. However, it's a good idea to open your rabbit's cage or pen while he's engaging in these behaviors as this signals to him that it's time to play and he can leave the cage when he's ready. You want to make sure your rabbit feels safe and comfortable with you as a playmate. You should make sure they don't perceive you as a giant.  Try to get down on the rabbit's level. You can sit, crouch, or lie down on the floor. Allow the rabbit the option of sitting on your lap or interacting with you physically. Some rabbits are cuddly and become "lap rabbits" with time, but most prefer independence during playtime. Rabbits can be timid, especially at first. You should not push playtime or certain toys if your rabbit seems uninterested. Let the rabbit adjust at his own pace.  Do not engage in rough house with a rabbit the way you would with a cat or dog. Rabbits are naturally timid and this could easily result in your rabbit feeling frightened around you.  Greet your rabbit cheerfully before you open his cage, saying his name and something friendly like, "Good morning." This way, she will associate you with pleasantness and be more likely to want to interact.  Pet your rabbit while giving him other positive feedback, such as friendly verbal cues or treats. You want him to associate your touch with safety and happiness.
Schedule regular play periods. Get down on the rabbit's level. Be patient.