You can do:
- spawn items
- build constructions
- spawn ragdolls
- explode & push everything

In this Sandbox game you can challenge your fantasy to create the most strange big and crazy structures shoot them up and throw different stuff. Good anti-stress solution if you are bored and want to chill out.
This game is called Sandbox because you are the one who creates your gameplay. You can build some things combine them or just explode everything and throw away.
This game has quite realistic physics so you would enjoy all the benefits from realtime realistic physics.