Have the babies outgrown their crib mattress? Are they set on sleeping in their transition beds? Don’t throw the crib mattress away just yet. If there’s no one next in line to use it, keep the crib mattress and start on a new project of repurposing this. Now that spring is almost here, a nice swing in the backyard will keep kids busy relishing in the outdoors, and their old crib mattress would be perfect to use for this.