Whether you need a double stroller for a 1.5-year-old and a newborn depends on your lifestyle, but for most parents, it is a near-essential investment. At 18 months, a toddler is mobile but lacks the stamina to walk long distances; they still require a safe place to nap and a secure seat in crowded areas. A newborn, of course, requires a bassinet or car seat attachment. A tandem (in-line) stroller is often the best choice for this age gap, as it is narrow enough to fit through standard doorways and the toddler can sit in the front while the newborn is closer to the parent. Alternatively, many 2026 parents opt for a stroller wagon like the WonderFold, which provides a playpen-like environment for the toddler and can be fitted with an infant car seat adapter. If you primarily do short walks or have a second adult always available to "wear" the baby in a carrier, you might delay the purchase. However, for solo outings to malls, parks, or theme parks, a double stroller is the only way to ensure both children are contained and comfortable simultaneously.