A fly plaid can be a bit of problem. You have to get the balance just right, otherwise it will try and lift your jacket up and off your shoulder. The other consideration is the brooch. If you intend to hold your child in your arms, there will be this lump of metal (and maybe sharp stone) just where his head will be. You could end up fussing with it all the time, rather than enjoying and taking part in a joyous celebration.

Regards

Chas