A good double stroller is a must for families with twins. With many models on the market, it can be difficult to find the right one. Should you get a lightweight, collapsible side-by-side? Or a heavy-duty tandem carriage? Before you buy a stroller, get tips from other parents and find out which type of stroller will work best for your family. Double Stroller Strategies: Find out which strollers rock, and which ones merely roll.