Holiday STEM Challenge Riddles for Classrooms

I light up the hallway tree with a tiny snap. Wires, bulbs, and batteries sit in my lap. What am I?

I'm a tower of gumdrops steady and tall, tested with books so I won't fall. What am I?

Made of craft sticks over paper snow, I carry a toy reindeer from row to row. What am I?

I'm a sled on string that slides from chair to chair. Add a jingle bell and see me glide through air. What am I?

I spin in the window when winter winds play. My blades are folded paper on a blustery day. What am I?

I keep marshmallow snowmen from melting down fast. Wrap me with foil and see the chill last. What am I?

I'm the ramp you build with cardboard and tape, timing toy sleighs on every shape. What am I?

I'm the glider you toss down the hall's long lane, decorated with snowflakes to test lift and plane. What am I?

I'm a coding game where arrows lead, making penguins waddle at just the right speed. What am I?

I'm a guess about which cookie will sink or float. Record your claim before you vote. What am I?

I am the tape holding your bridge together during the test. What am I?

I am the ruler measuring how tall your gumdrop tower stands. What am I?

I am the weight placed on top to test if your structure holds. What am I?

I am the marble rolling down the ramp you built. What am I?

I am the blueprint sketched before building begins. What am I?

I am the team huddle planning who builds what. What am I?

I am the stopwatch timing how fast the sled travels. What am I?

I am the failure when the bridge collapses and you try again. What am I?

I am the improvement made after the first design did not work. What am I?

I am the cheer when your structure finally holds the weight. What am I?

I am the battery powering the holiday light circuit. What am I?

I am the bulb glowing when the circuit is complete. What am I?

I am the thermometer measuring ice cube melt times. What am I?

I am the graph recording which cookie sank and which floated. What am I?

I am the prediction written before the experiment starts. What am I?

I am the snowflake symmetry drawn with a ruler and protractor. What am I?

I am the pattern block snowman built with geometric shapes. What am I?

I am the coding arrow pointing the robot penguin forward. What am I?

I am the reflection journal explaining what you learned today. What am I?

I am the station rotation card telling you where to go next. What am I?