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- Crazy “zipper truck” snaps LEGO-like bricks together to build a tunnel in 24 hours Wed, 2 Mar 16, 2:11amJust as you zip up your jacket, the “zipper truck” quickly assembles tunnels and archways by locking together pre-made concrete blocks that fit tightly together...
- Crazy “zipper truck” snaps LEGO-like bricks together to build a 1/4-mile tunnel in 24 hours Wed, 2 Mar 16, 2:11amJust as you zip up your jacket, the “zipper truck” quickly assembles tunnels and archways by locking together pre-made concrete blocks that fit tightly together...