Block Center materials include all kinds of things to build with, put together and take apart, fill and empty, and pretend with. 

Building Materials:
Large hollow blocks, ramps, boards
Unit blocks (as many shapes and sizes as possible)
Small blocks (multicolored and/or plain)
Cardboard blocks
Blocks made from boxes or milk cartons, covered with cloth or contact paper
Pieces of carpet, cardboard, Plexiglas, styrofoam
Sheets, blankets, tarps, tents
Packing boxes
Boards, sticks, logs, tree stump rounds and stumps
Cardboard, metal or plastic tubes
Robe and pulleys

Take-apart-and-put-together Materials:
Wooden or plastic "take-apart" trucks and cars (some that snap, some that screw)
Large Tingertoys
Interlocking blocks and boards
Clip-on wheels and blocks
Interlocking train tracks
Plastic plumbing pipes and connectors

Fill-and-empty Materials:
Dump trucks, pickup trucks
Boxes, cartons, baskets, cans, buckets, crates, picnic baskets
Small blocks
Small vehicles, people, animals
Dollhouse furniture
Empty sewing spools
Stones, pea gravel

Pretend-play Materials:
Cars and trucks (scaled to blocks)
Construction and farm vehicles
Planes, helicopters, boats, trains, buses
Multiracial dollhouse people, dollhouse furniture
Wooden, rubber, or plastic animals familiar to children
Steering wheel

Reference photos:
Display photographs of children's homes, neighborhoods, farms
Display photographs and drawings of children's block structures.