Doors to Discovery
Choose a door to learn about an accidental invention!
Start
Choose a door to learn about the accidental invention hiding behind it!
At the 1904 World's Fair in St. Louis, an ice cream seller ran out of bowls to serve his treats. Right next to his booth was a waffle vendor who wasn't selling much.
Thinking fast, the waffle maker rolled one of his waffles into a cone shape while it was still warm. The ice cream seller put a scoop inside -- and the ice cream cone was born. Customers loved it, and soon, the cone became a popular way to enjoy ice cream.
Directions:
1. Click on the blue question mark to open up your first question. 2. Click on each scoop of ice cream that's revealed to answer the remaining questions. 3. Your assignment is complete once the cherry is on top. 4. Make sure you answer the question in Canvas to submit your assignment!
One day in 1941, a man named George de Mestral was walking his dog through the woods. When he got home, he noticed burrs - those sticky little seeds - stuck to his dog's fur and his pants. Curious, he looked at them under a microscope and saw tiny hooks.
That gave him the idea to invent Velcro - a fastener made of tiny hooks and loops. It took years to perfect, but today Velcro is used on shoes, jackets, and even space suits!
Directions:
1. Click on the first blue question mark to open your first question. 2. Click on each pair of Velcro sneakers as they appear to answer the remaining questions.
Way to go! Click here to choose another door!
In the 1940s a man named Richard James was working with springs to keep ship equipment steady at sea. One day, he accidentally knocked a spring off the table -- and it "walked" down the stairs!
He and his wife saw how fun it looked and decided to turn it into a toy. That's how the Slinky was invited. It became a huge hit with kids all over the world.
Directions
1. Click on the first Slinky to open your first question.2. Click on each Slinky as it appears to answer the remaining questions. 3. Your assignment is complete once the slinky reaches the floor.
In 1928, a scientist named Alexander Fleming was studying bacteria. He went on vacation and left some petri dishes out in his lab. When he came back, he noticed mold growing in one dish - but something strange had happened.
The mold had killed the bacteria around it! That mold turned out to be penicillin, the world's first antibiotic. It has saved millions of lives by fighting infections.
Directions
1. Click on the first piece of bacteria to open your first question.2. Click on each bacteria as they appear to answer the remaining questions. 3. Your assignment is complete once the mold takes over the petri dish.
Doors to Discovery - U1-L1
Middle School
Created on February 2, 2026
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Transcript
Doors to Discovery
Choose a door to learn about an accidental invention!
Start
Choose a door to learn about the accidental invention hiding behind it!
At the 1904 World's Fair in St. Louis, an ice cream seller ran out of bowls to serve his treats. Right next to his booth was a waffle vendor who wasn't selling much.
Thinking fast, the waffle maker rolled one of his waffles into a cone shape while it was still warm. The ice cream seller put a scoop inside -- and the ice cream cone was born. Customers loved it, and soon, the cone became a popular way to enjoy ice cream.
Directions:
1. Click on the blue question mark to open up your first question. 2. Click on each scoop of ice cream that's revealed to answer the remaining questions. 3. Your assignment is complete once the cherry is on top. 4. Make sure you answer the question in Canvas to submit your assignment!
One day in 1941, a man named George de Mestral was walking his dog through the woods. When he got home, he noticed burrs - those sticky little seeds - stuck to his dog's fur and his pants. Curious, he looked at them under a microscope and saw tiny hooks.
That gave him the idea to invent Velcro - a fastener made of tiny hooks and loops. It took years to perfect, but today Velcro is used on shoes, jackets, and even space suits!
Directions:
1. Click on the first blue question mark to open your first question. 2. Click on each pair of Velcro sneakers as they appear to answer the remaining questions.
Way to go! Click here to choose another door!
In the 1940s a man named Richard James was working with springs to keep ship equipment steady at sea. One day, he accidentally knocked a spring off the table -- and it "walked" down the stairs!
He and his wife saw how fun it looked and decided to turn it into a toy. That's how the Slinky was invited. It became a huge hit with kids all over the world.
Directions
1. Click on the first Slinky to open your first question.2. Click on each Slinky as it appears to answer the remaining questions. 3. Your assignment is complete once the slinky reaches the floor.
In 1928, a scientist named Alexander Fleming was studying bacteria. He went on vacation and left some petri dishes out in his lab. When he came back, he noticed mold growing in one dish - but something strange had happened.
The mold had killed the bacteria around it! That mold turned out to be penicillin, the world's first antibiotic. It has saved millions of lives by fighting infections.
Directions
1. Click on the first piece of bacteria to open your first question.2. Click on each bacteria as they appear to answer the remaining questions. 3. Your assignment is complete once the mold takes over the petri dish.