On our first trip, our "baby" was 4 and we had a stroller for him. We also have 3 older kids, who at that time were around 8, 9, and 10. I can remember them fighting over who wanted to ride with him. The stroller was great for him. He took naps in it while the older kids were doing other things. That is a lot of walking for little legs - bigger legs too - but a little one can't really keep up. Our second trip he was 6 and we didn't get a stroller, but I remember once he got lost for about 30 minutes. Longest 30 minutes of my life! He's 19 now, so he definitely no longer needs one.