sandbox

Many playgrounds have a sandbox, an area that's full of fine, soft sand for kids to play in. For many children, all they need is a sandbox, a shovel, and a pail to be perfectly happy.

In North America, this common plaything is called a sandbox, while in the U.K. you'll hear it called a sandpit. It's not unusual for people with yards and young children to have a sandbox at home, and they're also found on school playgrounds and in public parks. Kids in sandboxes will dig holes, fill toy trucks with sand, mix the sand with water, and (occasionally) throw sand at each other.

Definitions of sandbox
1

n a plaything consisting of a pile of sand or a box filled with sand for children to play in

Synonyms:
sandpile, sandpit
Type of:
plaything, toy
an artifact designed to be played with

n mold consisting of a box with sand shaped to mold metal

Type of:
cast, mold, mould
container into which liquid is poured to create a given shape when it hardens

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