You will need to find a box but everything else can be found at the toy library. The Imagination Tree: Small World Play: Cardboard Box Town
Pretend Play Invitation to Play: Small world Construction Site in a cardboard box. Toy for boys to play with sand and small cars.
Oooh I think I need another one! From an old cable reel and artificial grass, ideal for small world play or for displaying items for investigation and exploration
Build-able Rock Slime that actually holds it's shape. (DIY kinetic rock) This is AWESOME! (How To Make Slime Kinetic Sand)