Well, when I was 8, I could, with the help of a handtruck and a cinch strap or bungie cord, But I was a big kid. IMHO, these are things every house should have (the dolly and bungie, not the big kid) becuase they are so handy. Just make sure to get a good dolly with the curved upright part, a good base, and the big pnuemo, "off road" wheels. The little hard ones break to easy, and don't help you worth beans.

Although, I've started to harbour a suspicion that other than aorund the middle, kids are smaller these days.