How can you build a house, retail shop, barn, swimming pool, or virtually any structure or sculpture imaginable? Get in the groove! Groovy Blocks building toys feature pieces that are grooved on all four sides for endlessly flexible construction possibilities. Simply slide the grooved building and engineered link pieces together to create super satisfying sturdy connections. Building blocks come in two sizes; hinge pieces make doors and window shutters that really work! Kids looking for a new twist on construction toys will think they’re groovy!