Mathematics
- Geo-board
- Box puzzle
- Match box
- Tree leaves
- Guatematica glossary
- 100-ball abacus
- Guatematica (elementary arithmetic in Guatemala)
Physics
- Orbit of ultra-small boomerang made of thick paper
- Undrinkable juice
- Empty-can whistle
- Handmade earphones
- Empty can concave mirror
- Boiling water in pipe with friction-generated heat
- Making an electrostatic motor
- Balloon hovercraft
- Making a paper clip motor
- Principle and properties of sound
- Making a dry cell battery tester
Chemistry
- Handmade battery
- Electric pen (write with electricity)
- Properties of various solutions
- Light, sturdy, and safe test tube rack
- Making a simple gas generator using a PET bottle
Biology
- Making a paper clip microscope and observe living organisms
- Making a water drop microscope (“Mr. Water Drop”)
- Banana and potato starch observation
- Experiment for studying leaf starch
- Digestion mechanisms using wafer paper
- Visualization method in blind spots
Geoscience
- Making earth-colored crayons
- Changes in land due to volcanoes
- Studying tsunami’s mechanisms using a model
- Making a balancing toy to check dryness
- Observing patterns of rainfalls
- Studying how seismic waves travel
- Making a sunset
- Making a portable moon altimeter
