Step 1: 💧 Water and 🌬️ Wind

Combine 💧 Water and 🌬️ Wind to create 🌊 Wave

Step 2: 🌍 Earth and 🌬️ Wind

Next, combine 🌍 Earth and 🌬️ Wind to create 🌫️ Dust

Step 3: 💧 Water and 🌍 Earth

Then, combine 💧 Water and 🌍 Earth to create 🌱 Plant

Step 4: 💧 Water and 🔥 Fire

Now, combine 💧 Water and 🔥 Fire to create 💨 Steam

Step 5: 💧 Water and 💧 Water

And then, combine 💧 Water and 💧 Water to create 🌊 Lake

Step 6: 🌍 Earth and 🌍 Earth

As next step, combine 🌍 Earth and 🌍 Earth to create 🏔️ Mountain

Step 7: 🌫️ Dust and 🌊 Wave

Combine 🌫️ Dust and 🌊 Wave to create 🏖️ Sand

Step 8: 🌱 Plant and 🌱 Plant

Combine 🌱 Plant and 🌱 Plant to create 🌳 Tree

Step 9: 🌱 Plant and 🌬️ Wind

Combine 🌱 Plant and 🌬️ Wind to create 🌼 Dandelion

Step 10: 💨 Steam and 🔥 Fire

Combine 💨 Steam and 🔥 Fire to create 🚗 Engine

Step 11: 🌊 Lake and 🌊 Lake

Combine 🌊 Lake and 🌊 Lake to create 🌊 Ocean

Step 12: 🏔️ Mountain and 🌊 Lake

Combine 🏔️ Mountain and 🌊 Lake to create 🏞️ Fjord

Step 13: 🚗 Engine and 🏖️ Sand

Combine 🚗 Engine and 🏖️ Sand to create 🏖️ Sandbox

Step 14: 🏞️ Fjord and 🌳 Tree

Combine 🏞️ Fjord and 🌳 Tree to create 🌲 Pine

Step 15: 🚗 Engine and 🌼 Dandelion

Combine 🚗 Engine and 🌼 Dandelion to create 🚁 Helicopter

Step 16: 🏞️ Fjord and 🌊 Ocean

Combine 🏞️ Fjord and 🌊 Ocean to create 🐳 Whale

Step 17: 🌲 Pine and 🏖️ Sandbox

Combine 🌲 Pine and 🏖️ Sandbox to create 🏠 Treehouse

Step 18: 🐳 Whale and 🚁 Helicopter

Combine 🐳 Whale and 🚁 Helicopter to create 🐳 Whalecopter

Step 19: 🐳 Whalecopter and 🏠 Treehouse

Combine 🐳 Whalecopter and 🏠 Treehouse to create 🌳✈️ Treehousecopter