The Sandbox, page-27

Trading in The Sandbox will be quite easy for the average Joe: by using the "SAND token" users will be able to interact with Ethereum without needing to know about ether:
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We understand that mass-adoption of blockchain technology will not come until we, as game developers and platform builders, eliminate all steps that create friction for non-crypto users who are looking for very simple and accessible user-experiences. We want to close the gap between traditional games and blockchain-based games.

The Sandbox uses its own ERC-20 utility token, SAND, to allow players to trade items created by the community. We are working hard to make such experience seamless for non-crypto users.

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https://medium.com/sandbox-game/native-meta-transactions-erc-1776-97460cc6fcf0