Their pricing structure would be similar to all karisma resorts for packages. (I'm Canadian too) in the way they structure them for kids.
On my package contract (sensatori) I have kids pricing 3-11 which is basically 1/2 price from adults... Then my teen pricing (12-17) is 75% of the adult price.
Have your TA ensure quotes for all three age categories when they can make sure you get great pricing for all of your guests! (We have about 20 kids coming! Haha so I know how important it is!)
My TA did quote me for all age groups. The 2 year olds they charge you only air fare, the 3-12's were like 70 percent less than the adults and the over 13 year were about 90 percent or so. I thought the kids would be cheaper under 12. Mind you - this is just a cost - the prices could differ once I confirm that contract and the deposits come in. I cannot seem them differing that much.
With the jade - the kids under 12 only paid for air fare.