You can clip it on a stroller, or even your purse or shopping cart, and it gives your child his own "spot," where he knows he should be. It gives him some independence and you a little peace of mind.
It's especially ideal for moms who have one child (or more) in the stroller and one walking.
While some children are probably more likely to embrace the tag*a*long than others, for less than $10, I think it's worth a try.
What do you think of the tag*a*long?