you could but it would be rather uncomfortable!
You could build the base out of concrete if your floor would support it but you would want a mattress with a lot more give. Regarding the heavy concrete base, I hear that far lighter types of concrete are now being made using ash and extruded styrene instead of sand in the concrete and with glass fibre or vegetable fibre instead of steel armature. It sounds like a good idea - the base wouldn't creak.
build a bed, get in the bed. if you're playing with multiple people all players must be in bed.
A bed is softer than concrete.
A Bed A Bed
A sleep number bed costs about as much as a regular bed
they can sleep with there parents in there bed or if they had a sleeping bag they can sleep with them but in the bed in the floor
"Flowers" have a bed (they are planted in flower beds) and they do not sleep.
they sleep like people in earth but they sleep in bed they pull them down to the bed
Buy another bed for you to sleep in, I guess.
you buy it a bed an make it sleep it will automatically do it
is the cover of the sleep number bed toxic
River bed
Depends if its trained or not everydog can sleep on your bed if its trained and the dog trust you