Your sentence is quite good, but I will help make a few small improvements for grammar and clarity. Here's your original sentence:
Rainforests in Asia are made of thick and vibrant plants. Playful monkeys easily swing from vine to vine, and a python hangs still after a big meal.
Corrections and explanations:
- Instead of "made of thick and vibrant plants," it's better to say "full of thick and vibrant plants" because forests are made up of many things, not just plants.
- The rest of the sentence is good, but we can improve clarity by splitting it or adding commas if needed.
Here is a corrected version:
Rainforests in Asia are full of thick and vibrant plants. Playful monkeys easily swing from vine to vine, and a python hangs still after a big meal.
This version sounds natural and grammatically correct. Keep up the great work!