Sandbox's Species

Sandbox's Species is an unnamed race of (possibly) sand-related aliens.

Appearance
It is unknown what this species looks like but given the wordplay of Sandbox's name, it is possible they are composed of sand.

Powers
It is possible that this species is capable of terrakinesis.

Omnitrix Transformation
The Omnitrix's representative for this species is named Sandbox, who was confirmed to exist in the original series episode "Ken 10". According to Derrick J. Wyatt, his DNA is currently not present in the Omnitrix as of Omniverse.

Sandbox has been used by Ben 10,000 (albeit off-screen).