Crib entertainment

Do you have any less stimulating toys in the crib? Like that aquarium that hooks to the side or like a stuffed animal that plays a lullaby?

I have mixed feelings because I think it might just wake him up more in the night. I'm very "business" in the night when he wakes up...minimal light, no talking, etc. I also don't know if it's never been there, if I should introduce it at this point. But I also thought maybe it would help him get back to sleep on his own. Idk.

Thoughts?

*Also, it auto corrected "lullaby" to "kill any". 😦 What the heck.