First Block
Every quest, every check and every badge is free and always will be. Teaching somebody not to lose their money, and charging them for it, would be a strange way to start.
All six quests, the checks, the badges, the answer desk and the safety list. No connection required to read anything; a wallet is needed only to claim a badge, because the badge is minted to you by you.
New quests before they are public — including sponsored ones, while they are still in review — and the bonus badges attached to them.