This layout is designed with the toddler in mind. It’s not that our little ones need larger holds but rather they need the holds to be closer together so they can reach the holds. Toddlers have plenty of hand strength but where they lack is upper body strength. Therefore, adding more medium sized jugs is the ticket to offer them a positive experience on your wall.
Note: The holds in the image are from the 25 Kids Screw-on Set #1 They attach wood screws.