D.’s Sandbox is an open source game based off of Minetest which is similar to Minecraft and Infiniminer. The goal is for the project to be school friendly but also provide a wealth of fun and creative activities such as Rollercoasters, Fishing, Creative Building, Boating, Race Car Racing, Exploring, Under Water Adventures, Land and Water Life, and much more!
A key reason for releasing the project this early into development is to get feedback from the community to see if you all like this as a potential engine for a new Sandbox or if maybe something else would be a better choice. It's much easier to make the switch now if need be than if I put a lot of time into it and realized it isn't a good choice. So right now the project will closely resemble Minetest but there are lots of things that I think the above games are missing that I plan to add. Also Minetest is not kid or school friendly which is a problem. Hopefully others find it useful too! I also plan to use D.’s Sandbox as the base for D. The Atom Shifter which feature combat, a story, quests, monsters, spells, experience and skills, and lots more!
Enjoy and please let me know what you think in the Sandbox Forums! Also it should be compatible with all Minetest Mods!
Head over to the Download Page to grab a copy!
Key features over Minetest:
– New menu logo and gametype logo for D.
– Cleaned up Minetest base to be school friendly
– Mods Mesacar (with a default value that enables it to climb trees and high walls)
– Boost_cart so that carts and rollercoasters can be created
– Minetest skins (/m to bring up the menu to change skins, D. still needs to be added)
– Streets Mod to make realistic roads and racecourses
– Added the Click Me To Start.bat and server.bat (in Bin) to make loading easier
– Currently windows binary only (32 bit)
– Removed the tick box to enable public servers to be viewed (adults can change it but it’d be bad for school kids to go on public servers) Private/school servers can still be hosted.
Over the next few days I will be posting more information about my plans for D.’s Sandbox and hopefully a video too about why I’ve picked it and its differences with Sandbox and all that good stuff.
Take care and I hope you enjoy it! 
-Mike
Looking forward to future updates :)