Gallery
Discover apps people built on Collabby by chatting. Run them, then remix to make them yours.
Drawing Things Smaller
How much smaller is a map than the real land? 📐 Try drawing a 100 m playground on 10 cm of paper. Shrink it 1,000 times and it fits exactly—but shrink it only 500 times and it spills off the page! The larger the land, the more you need to shrink it. 📏 Now measure 3 cm on a map. If the scale is 1:1,000, how many meters is that in real life? 🔍 Finally, change only the scale on the same paper. Shrink a little and barely a desk fits; shrink a lot and a whole city fits. How can you see more detail? This app was made with code too · Remix it to measure the distance from your home to school!
Which Way Is North?
When you unfold a map, which way is north? 🧭 Turn the compass needle through the eight directions. The gray tail moves too, so you can see that opposite directions always face each other. 🗺️ Next, explore a map of our neighborhood. Which way is the park from the school? Here’s the fun part: the same two places can have opposite directions depending on where you look from. 🚶 Finally, find your way. Tap a direction button to walk one square at a time to your destination. Going diagonally takes fewer steps—how few can you use? This app was made with code too · Remix it with a map of your school neighborhood! },
Flattening the Round
What happens when we transfer our spherical Earth onto flat paper? 🍊 An orange peel can’t lie flat without tearing—and Earth is the same. If we force it flat, some places stretch. Choose a latitude: the Equator stays the same, but around 80°, the width stretches nearly sixfold! ⚖️ That’s why Greenland looks so huge. Compare true area (green) with map size (orange): of the four lands, the one that’s truly smallest looks second-largest on the map. 🧭 Finally, tap the three maps. Preserve area and shape gets distorted; preserve shape and area gets distorted. Can you find a map that preserves all three? This app was made with code too · Remix it and compare our country’s size!
Mountains in Lines
How can we draw a mountain’s height on flat paper? 🍰 Slice the mountain horizontally at equal heights. The side view appears on the left and the top view on the right, making it easy to see that “each cut becomes a line.” The more closely you slice, the more lines you get—and the more detail you see. ⛰️ Now keep the height the same and change only the mountain’s width. A narrow base makes the lines bunch up; a wide base spreads them out—so “close lines mean steep slopes.” 🗺️ Finally, read a real contour map. Find the highest and lowest places between two peaks! This app was made with code too · Remix it and draw the hill behind your neighborhood!