festival

We were just at a festival in Japan.

A 'festival' is a kind of celebration that usually has food, music, performances and maybe things for sale. Notice the following:

1. The most important festival here is in January.
   
2. Do you enjoy going to festivals?
   

adult people

It's like a big box that adult people try to carry together.

'Adult people' is just another way of saying 'adults' or people that are older than children. Notice the following:

1. She spent a lot of time with adult people when she was a kid.
   
2. This is more a show for adult people.
   

kind of

They kind of celebrate a harvest or happiness or those kind of things.

We use 'kind of' when the answer or description we are giving is not exact. Notice the following:

1. I kind of want to stay in and relax.
   
2. Is it kind of like a cake?
   

like

People like to eat this candy that looks like a pancake.

When you 'like' to do something you enjoy it or it gives you pleasure. Notice the following:

1. He likes to play video games after work.
   
2. Do you like to visit historical sites?
   

sounds good or try it

That sounds good; i think I should try it too.

If something 'sounds good' it seems like a good idea. If we taste or do something for the first time we are 'trying it.'  Notice the following:

1. Does pizza sound good for dinner?
   
2. I know you don't usually eat spicy food, but this curry is great, you should try it.