• +90

  What is a pinhole camera, and how does it work?

  Charis — Houston, TX

• +152

  What is the longest river on Earth?

  Jenni — Imperial Beach, CA

• +1666

  How are people beautiful on the inside?

  Megan — Midlothian

• +965

  How do we navigate using stars?

  Justine — Union City, CA

• +2350

  How does a toy top spinwithout falling down?

  Colleen — Glen Ellyn, IL

• +1785

  Do toads give you warts?

  Ernest — Crestview, FL

• +2272

  How does 3D printing work?

  Shannon — Sun Valley, CA

• +1885

  What is a coat of arms?

  Stephanie — Pasadena, MD

• +1970

  What is the Harlem Renaissance?

  Julie — Dedham, MA

• +1823

  what is cerebral palsy?

  Sharon — Concord, NC

• +1117

  How does a website remember all of the usernames and passwords?

  Nadya — Forked River, NJ

• +6711

  How do jellyfish know where they are going without eyes

  Krissi — Elk Grove Village, IL

• +2605

  What is the difference of a PSA and a commercial?

  Jason — Eastvale, CA

• +2387

  Who discovered the first dinosaur bone?

  Charlotte — Chagrin Falls, OH

• +3044

  How do you build a building such as a school?

  Jessica — Union Grove, WI

• +2875

  What is biomimicry?

  Amy — San Antonio, TX

• +3016

  why are there beached whales

  Collin — St. Francis, MN

• +3048

  How were Americans able to win the Revolutionary War?

  Gabrielle — chicago, IL

• +3910

  how do you control moving?

  Amelia — Catonsville , MD

• +3052

  Who was King Tut?

  Dana — Richmond, TX

• +4027

  How does a color printer print all the different colors?

  Michael — Charlottesville, VA

• +3772

  What do kids play in other countries?

  Michelle — Wrightsville , PA

• +2929

  How does cow manure turn in to fertliszer

  Owen — Seattle, WA

• +2997

  How do you be internet safe?

  Gabriel — Los angeles, CA

• +3359

  How bees make honey

  Nicole — Vaucluse

• +3145

  do animals use GPS

  Kartik — AUCKLAND

• +4300

  how do you create a video game

  Destinee — New Jersey, NJ

• +2804

  Why do houses have windows?

  P. — Oshawa, OH

• +2584

  Why are some people introverted and some people extroverted?

  Kilee — Shawnee, KS

• +3324

  Why don't all markers work on white boards?

  Jon — Merrick, NY

• +2883

  How do bees and wasps make their hives and what material is it made from?

  Karen — North Andover, MA

• +4831

  Why are dimes smaller than pennies?

  Acacia — Round Rock, TX

• +2451

  Do frogs hibernate?

  mark — Lockhart, TX

• +2021

  Why was the Periodic Table made?

  Ryan — Delaware, OH

• +5578

  How many cars are on the road at one time?

  Mrs. Clark's Class — River Falls

• +2076

  Why are planets spherical and not cuboid or any other shape.

  Sonika — stone ridge, VA

• +2738

  How was the telescope invented?

  Miss Lipman's Class — Greenwich

• +1412

  Who was Muhamad?

  Heba — Fontana

• +1451

  Do decomposers decompose decomposers?

  Rina — Sunbury, OH

• +1288

  What is surface tension and how does it work?

  Koenig Class — Arlington Heights, IL

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