Step 1: 💧 Water and 🌬️ Wind

Combine 💧 Water and 🌬️ Wind to create 🌊 Wave

Step 2: 💧 Water and 🔥 Fire

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

Step 3: 🔥 Fire and 🔥 Fire

Then, combine 🔥 Fire and 🔥 Fire to create 🌋 Volcano

Step 4: 🌍 Earth and 🌬️ Wind

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

Step 5: 🌱 Plant and 💧 Water

And then, combine 🌱 Plant and 💧 Water to create 🐊 Swamp

Step 6: 🌱 Plant and 🌬️ Wind

As next step, combine 🌱 Plant and 🌬️ Wind to create 🌼 Dandelion

Step 7: 🌊 Wave and 🌱 Plant

Combine 🌊 Wave and 🌱 Plant to create 🌊 Seaweed

Step 8: 💨 Steam and 🔥 Fire

Combine 💨 Steam and 🔥 Fire to create 🚗 Engine

Step 9: 💧 Water and 🌍 Earth

Combine 💧 Water and 🌍 Earth to create 🌱 Plant

Step 10: 🌋 Volcano and 🌫️ Dust

Combine 🌋 Volcano and 🌫️ Dust to create 🌋 Ash

Step 11: 🌫️ Dust and 🌱 Plant

Combine 🌫️ Dust and 🌱 Plant to create 🌱 Pollen

Step 12: 🌼 Dandelion and 🐊 Swamp

Combine 🌼 Dandelion and 🐊 Swamp to create 🐸 Frog

Step 13: 🚗 Engine and 🌊 Seaweed

Combine 🚗 Engine and 🌊 Seaweed to create 🚤 Submarine

Step 14: 🌱 Plant and 🌱 Plant

Combine 🌱 Plant and 🌱 Plant to create 🌳 Tree

Step 15: 🌱 Pollen and 🌋 Ash

Combine 🌱 Pollen and 🌋 Ash to create 🤧 Cough

Step 16: 🚤 Submarine and 🐸 Frog

Combine 🚤 Submarine and 🐸 Frog to create 🐸 Scuba Frog

Step 17: 🤧 Cough and 🌳 Tree

Combine 🤧 Cough and 🌳 Tree to create 🌲 Cedar

Step 18: 🌲 Cedar and 🐸 Scuba Frog

Combine 🌲 Cedar and 🐸 Scuba Frog to create 🐸 Tree Frog