Building Sets and Blocks by  "5 years old" and "Classroom"

Roylco Crystal Color Stacking Blocks, 50 pieces

GONGE - River Stones & Hilltops Combo Set: The Original Non-Slip Stepping Stones for Kids, Nordic Colors, Set of 9

Guidecraft Branch Blocks: 36 Pieces

Popular Playthings Magnetic Build-a-Truck™ Construction Set

Cupstruction Forts

Geomag™ Magicubes Shapes Recycled, 13 Pieces

Magnetic Discovery Mega Ball Run

Tegu Magnetic Wooden Blocks, 14-Piece Set, Tints

Quercetti® Georello Tech Gears In Motion

Learning Resources^® City Engineering & Design Building Set

Popular Playthings Hexie-Snaps® Building Blocks with Storage Tub, 96 pieces