Wife came to me and asked if I could make something to attach two umbrella strollers to make one stroller so she could easily push them both at the same time. I remixed an idea here (linked below), but the diameter of the strollers didn't match my strollers. These "snap" on the stroller to create a strong grip. Print at least two of these for stability and simply snap the strollers together. Including the Sketchup file incase your stroller size differs.