One of the drawbacks to adulthood is the lack of Play-Doh. People just look at you funny if they see you building a spaceship out of clay for some reason. But with Sugru ($18), that all changes. This moldable, foldable silicone rubber is a true handyman’s tool, sticking to everything from metal to fabric to leather. Use it to patch up a busted bicycle seat, or just go right back to building that spaceship with a clear, mature conscience. Your call.