You will receive a printout of available credits upon check in. As you use a credit from the plan, your receipt will print your remaining balance at the bottom.
You can request an updated printout of credits available from your hotel that will show you where you have spent your credits.
CS are pooled between adults and children. For example 2A/2C staying 4 nights would look like this at check in
8 Adult TS credits
8 Child TS credits
16 CS Credits
16 Snack Credits