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How Do Pumpkins Grow SO Big?

Some pumpkins grow bigger than a school bag — the biggest ever weighed more than a small car! 🚗

But every giant pumpkin starts as a tiny seed you could hold on your fingertip. In this lesson you'll follow the whole journey, step by step, and play along the way. Ready? Tap Next!

👀 Look for the fun activities — you can tap, pour, and slide!

1. A Tiny Seed Wakes Up

A pumpkin seed is small, flat and white. When it gets warm soil, water, and a little time, it wakes up and cracks open. This is called germination.

Tap the seed to help it sprout! 👇

🌱 Pop! A little root grows down to drink water, and a shoot pushes up toward the light. A pumpkin is born!

2. Roots Drink Lots of Water

Under the soil, hungry roots spread out and drink water — a growing pumpkin can gulp buckets of water every day! Water helps the plant carry food and puff up big and round.

Roots are thirsty — pour a few times!

3. Leaves Catch Sunlight

The big green leaves are like tiny food factories. They catch sunlight and mix it with air and water to make sugar — the plant's food. This clever trick is called photosynthesis.

Tap the sun to send sunlight to the leaves and make food! ☀️

Food made: 0 / 5 🍬

4. A Flower Becomes a Pumpkin

The vine grows bright yellow flowers. Busy bees 🐝 carry pollen from flower to flower. After a flower is pollinated, its base swells and slowly turns into a baby pumpkin!

Put the pumpkin's life in the right order. Tap the stages from first to last:

🎃 Big pumpkin 🌰 Seed 🌼 Flower 🌱 Sprout

5. Sun + Water + Time = BIG

Here's the secret to size: a pumpkin keeps making sugar every sunny day and stores it inside. The more days of sunshine, water, and food, the bigger it swells. Farmers give giant pumpkins the whole summer to grow!

Drag the slider to add days of growing. Watch it swell! 🎃

0 days  •  about 0.1 kg

6. Mostly Water Inside!

Here's a surprise: a pumpkin is about 9 parts out of 10 water! 💧 That's why it feels heavy and looks so shiny and plump. All the water the roots drank is stored inside the fruit.

🧪 Fun fact: Cut a pumpkin open and it's wet and soft inside — because it's packed with water, sugar, and seeds ready to grow the next generation.
🌡️ Pumpkins love warm, sunny weather. In Singapore's steady sunshine, plants can grow all year — but they still need water every day.

Almost there — one more slide to wrap it all up!

🎉 You're a Pumpkin Expert!

Let's recap how a pumpkin grows so big:

🌰 A seed wakes up and sprouts.

💧 Roots drink lots of water.

☀️ Leaves catch sunlight to make sugar (food).

🌼 A flower is pollinated and becomes a fruit.

⏳ With sun + water + time, it swells huge — and it's mostly water inside!

Great work following the whole journey! 🎃 Next time you see a pumpkin, you'll know the amazing story behind its size.