Succulent plants?

[Miss Roddam]

Hi, so i was wondering if Succulent plants are safe for Whites Tree Frogs? My frogs are in a wooden vivarium which is about 23"x18"x12"
LengthxHeightxWidth. (It's not the best set-up I know, and i'm hoping to get a glass vivarium once my room has been decorated, either that or i could convert a storage box so it is tall enough for my 2 frogs )
My mum has a TON of these plants, pretty much in every corner of the house so I was wondering if these plants were ok? Sorry they are just pictures from the internet, not from my house.


Thanks