Awesome Pics.
Wedging is when they place a shim under the boot on top of the blade holder in the back, the wedge is a little hard to see sorry. The easiest way to understand this is to lift your heals off the ground. your body will want to bend the knees to keep a good center of balance. Thats what it does. You can have the blades profiled instad, but with little kids skates its a bad idea as they will grind off a lt of blade and there is not a lot of blade to begin with. Its better to find a good proshop have them wedge and radius the skates and only take them to them. The other thing to note is that on childs skates they generally run an 11ft or more radius vs a 9ft radius. This is done to give the child more stability. More blade surface is on the ice at aany given time. The issue is it leads to a crappy stride when combined with a nuetral profile as the kids dont understand to bend their knees yet. You will see many kids I am sure barely lifting their skates of the ice and instead plodding along. Long story short they will learn habits which will need to be corrected later. Do this tricks them into bending the knees and taking longer strides.
The pic in my avatar is Micah last year at not even 4.5. This was after I had his skates radiused to 9ft then had the wedges put in the back. He went from looking like he was going to fall backwards to a great stride for his age in a few weeks. Well atleast when he cares to skate hard.
I actually keep debating starting a blog regarding some of these things to help out parents in non traditional hockey markets like mine. These are little things but all of them together help the child learn a better stride without trying to explin to them. They just adapt. Stride and foot comfort are two things I spend a lot of time on with Micah. If your feet hurt you dont want to skate. If you cant skate you cant play. With a great stride and comfortable feet you focus on the rest of the game.
OOO and the insert on the top in the pick is a CCM Tack 10.5 Y The insert on the bottom is the Graf 10. It is longer then the 10.5. So what ever you decide if you go with the Graf they do run long. This was an issue for Micah at first, thankfully his feet grew and it solved itself. I and most people I know are strongly against oversized skates for kids because it results in bad stride also.
Sorry for the soap box its a particular passion of mine.