They are way more fun if you click on them--they get really big.
Those are Dungeon Life Bendy Dungeon Walls which are nice because they're light and fast but they still stay up. BTW--they don't actually bend, they're regular plastic--but the joints between them are wiggly so you can make curved walls. Also, they include freestanding doors, which I like because I can just be like "Ok, here's you, here's the door, here's the area of effect of the Gelatinous Kidney spell you just unwittingly unleashed."
I got them for free to use on TV, but, as not-strictly-necessary DnD toys go, they're pretty good. I use them every time I play at home, which is more than I can say for almost any other game stuff I ever got sent.
(She got turned into a wolf at one point.)
(DNDWP girls + any bridge = epic slaughter)