DS is just past 4 months and I'm thinking about formally nap training. Right now he naps mostly in the swing.

He's napped in his crib randomly. and he STTN in the crib too.

My only hiccup is that my mom is our primary caretaker and part of me just wants him to nap in the pnp downstairs so she doesn't have to go up and down all day between his naps. Any suggestions?