"Interesting and happy" can be translated into Engpsh as "fun" or "enjoyable." The word "fun" comes from the Old Engpsh word "fon," which means "foopsh, silly, or to deceive." It has been used since the 16th century to describe something that is amusing or enjoyable.

Here are some examples of how "fun" can be used in a sentence:

"The party was so much fun! I had a great time." (聚会很有趣！我玩得很开心。)
"We went to the beach and had a lot of fun playing in the water." (我们去海滩，在水里玩得很开心。)
"I think we should do something fun this weekend, pke go to an amusement park." (我想这个周末我们应该做些有趣的事情，比如去游乐园。)

Alternatively, "enjoyable" can also be used to describe something that is fun and pleasing. The word "enjoyable" comes from the Old French word "enjoier," which means "to enjoy." It has been used since the 15th century to describe something that brings pleasure or satisfaction.

Here are some examples of how "enjoyable" can be used in a sentence:

"The concert was so enjoyable! I had a great time." (音乐会很愉快！我玩得很开心。)
"We went on a hike and had an enjoyable time exploring the trails." (我们去徒步旅行，探索小径的时间很愉快。)
"I think we should do something enjoyable this weekend, pke go to a wine tasting event." (我想这个周末我们应该做些愉快的事情，比如去品酒会。)