Remember when crocheting was something only your grandma could get excited about? Well, the times have changed and so did crocheting, which in the 21st century has become way more impressive, as you’re about to witness thanks to these giant crocheted urchins floating above Singapore’s Marina Bay.

A team of 50 people has spent 2 months twisting the double-braided polyester chords to create this trio of urchins that interact with natural light during the day, and glow when illuminated at night. A single urchin is about 56 feet (17 meters) in size and weighs about 220 pounds (100 kilograms).

The idea behind the art piece is to disrupt the mundane routine of daily life: “Seeing hovering and glowing lacy objects against majestic skyscrapers and dark water would make them pause and gaze. This momentary pause of the mundane routine of our life would hopefully give us an opportunity to find the poetry around us.”

The group behind the installation is the London and Seoul-based collective Choi+Shine Architects, who have created this otherworldly design for the Singapore’s 2017 iLight Marina Bay Festival.