My DD is a bit older, but she comes in the bathroom with me and either reads a book or watches and we play peek a boo through the fogged up glass, although this game often gets cut short cause I don't want to waste water!
DS is 12 months old, we play peek a boo through the glass too!

I wait until morning snack time after his nap to sometimes have a shower. He eats his rice cakes on the bathroom floor and plays with my velcro rollers. Easy pleased.