hello
I think if anything they are a choking hazard and for that reason alone, I would take them away from her. Why risk it.. .
As for them being a toy, if concerned , do ask your church about it and see what they think. My personal opinion however is that they are considered sacred in the same way that other religions have their sacred items, When I have gone to the Buddhist Temple where one, you Don't wear shoes due to it being a sacred place, you also don't leave any of the Dharma on the floors, this includes their books, fliers and or other things THEY consider sacred. Of course, it's all about intentions and your child has NO bad intentions here when playing.. no child does. BUT.. it's never too early to also teach a child respect of that which is sacred to others and other people's cultures..
best of luck