Robins. Every year we help them raise their young :)) No, we don't try to play with them on purpose. But we have to periodically pick them off the ground and walkways and put them back into their nests. Robins' nests are always low off the ground and easy to reach, thankfully. Eventually, when we try to put them back, but they won't stay in and run or fly away. Then we know our job is done and they are gone.