For all the "fun" kids can have on your walls, this is probably one of the most fun and least destructive. MagScapes, a product from the British company Pepper-mint, is a combination of magnet receptive wallpaper and precision-cut magnetic decorative motifs. You can pick and choose from a variety of each to make a completely personal, customizable wall design. If you get bored with it, you can simply rearrange the motifs, and - voila! - a new wall.

While not exactly inexpensive (the wallpaper is £50-£95 per roll, and the motifs are £50 per set), this could be a slick way to dress up a wall in the kids' room or the living room. As much as I think kids would love this, I'm sure I would have a blast too.