Now that it's getting cold out, my kids are practically living on their Prince Lionheart Wheely Bugs (an indoor ride-on toy.) DS3 has the large and DS1.5 has the small, but they switch up occasionally. They are built with those office chair casters, so they work well on hardwoods or a basement floor. My boys have A LOT of energy, so this splurge was well worth it for our family.