We love these around the house, the backyard and the pool.  They serve as extra seating yes, but also hours of entertainment.  the kids balance on them, wiggle on them, float on airplane on them, they are too much fun.  2 years in and I am still receiving compliments on how unique they are.  Only reason I didnt give it five stars is that the black stools depressed in the middle and never popped back up.  Strange, the orange ones didnt do this.  Its not that big a deal, just a little off when they are lined up.   Not perfectly even!