The Collaborative International Dictionary of English v.0.48:
Sandpit \Sand"pit`\, n. A pit or excavation from which sand is or has been taken. [1913 Webster]WordNet (r) 3.0 (2006):
sandpit n 1: a large pit in sandy ground from which sand is dug 2: a plaything consisting of a pile of sand or a box filled with sand for children to play in [syn: sandbox, sandpile, sandpit]