Brand new. Larger box is not sealed but was not played with. The smaller box is sealed. Construct Vibrant Creations: The soft foam blocks in this set come in an array of shapes, sizes and colors, and easily stack into tall, teetering towers on the special building platform Explosive Fun: KaBlocks Blast uses kinetic force rather than air power to send soft foam blocks soaring over 6 feet into the air; even the smallest three-year-old can create impressive explosions time after time