Practicing indoors

There's a ball called The Floppy that's great for practicing indoor shots.
I've found I can even hit full shots into a wall without any damage.
However, I did find that if you hit one into a heavy, framed, glass-covered picture the force of the ball - while it won't necessarily break the glass directly in my experience - can (and yesterday, New Year's Day, did) cause the picture, if precariously hung, to fall and shatter the glass. It was one of my wife's favorites.
Such started out the new year. I would have been much better off braving the 34 degree temperature and going to one of the local courses. I beat my wife to the punch and stated that hitting balls indoors, even ones designed for the task was foolish of me and I was going to retire to my study for a "time out" to think about what I'd done.
For backyard practice I would suggest the Almost Golf ball. It's reported to go about one-third of the distance of a regular golf ball; thus, although I've hit windows of my own house I've yet to shatter one. However, after yesterday's picture event, I should probably - for the time being - only practice chip shots outdoors and leave the driver for the driving range.