sandpit

from 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}]

from 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]