It could be he is not keen on the sides, as he is already climbing out, remove them I think it possible he may stay in bed then ...good luck
Yes the toddler bed has sides, and I do think it may just be a phase. My fiance used to sleep walk so he may be getting it from him. I just thought it was kinda funny.
wouldn't stress unless you have cold floors and he could catch a chill, but I agree with the others...just put a blanket down, give him his pillow, and let him go for it. My 3-year-old sometimes wants to fall asleep on her floor too and makes herself a bed...but she also sleeps in her bed 95% of the time so I don't think sleeping on the floor occasionally will cause an issue :-)
make him a pallet on the floor and let him have at it! Just a fun thing to do.
Maybe he likes it. I wouldnt be too worried.
just something hes found he can do , has the toddler bed got sides to it, hew may like climbing over ?