K.H.
I used the harness kind. don't recommend the kind that attaches to the wrist b/c it can put them off balance if they get tugged by the arm like that. Other than a woman asking my husband if he rolled over and did other tricks, (my husband calmly responded "no, but I always know where he is.")we absolutely loved the harness. Get one and begin using it right away. Put it on him at home and just let him wear it around to get used to it. Drew was a very very busy toddler and this was so helpful in keeping up with him. It worked so well, he graduates HS in 3 weeks and doesn't need it anymore. LOL :-D