Sparks are a SerraForge hub currency/reward count. The site header shows a signed-in member's balance and links to its ledger.

Use the Sparks Ledger to review your balance and activity. Some hub features, such as the Capsule Shop, use Sparks.

Sparks on SerraForge do not automatically mean every separate virtual pet world uses the same in-game resources. Check the rules on each destination before assuming currencies transfer.