Your Charisma score increases by 2.

Muppets are made at a specific age and are unable to age past that.  As such, maturity is only based upon how Muppets feel rather than an actual age of maturity.  Muppets are unable to die of old age, however improper care for themselves can lead them to wither away and eventually die.

Muppets love self-expression and creation.  Whether it be good values or bad, Muppets believe that anyone should be able to express themselves and exist how they want.  There are very few lawful Muppets, however they do exist.

Muppets come in every shape and size, but they tend to be between 2 feet and 3 feet.  Your size is Small.

Your base walking speed is 30 feet.

Popularized by Muppet Elders Statler and Waldorf, Muppets have learned the ability to deal criticism that preys upon the insecurities of the victim.  You can utilize the Vicious Mockery Cantrip at 1st level, and, once you reach 3rd level, you can cast the Hideous Laughter spell at Level 1 once every Long Rest.

Muppets have a wide variety of talents when it pertains to music.  As such, you have proficiency in one instrument of your choice.

Muppets are naturally durable and can take many hits without dying.  When you are reduced to 0 hit points but not killed outright, you can drop to 1 hit point instead. You can’t use this feature again until you finish a long rest.

Over generations, the Muppets have entertained the civilizations all over the world.  You have proficiency in the Performance Skill.

Even though you were made, you are a living creature. You are immune to disease. You do not need to eat or breathe, but you can ingest food and drink if you wish. Instead of sleeping, you enter an inactive state for 4 hours each day. You do not dream in this state; you are fully aware of your surroundings and notice approaching enemies and other events as normal.

You can speak, read, and write Common, Undercommon, and Muppetish.  Muppetish, to an unknowing ear, sounds like a bunch of screams.  Little do they know, it is a bunch of screams at varying pitches.  While some do learn Muppetish, it has very little use as Muppets do not write very many things down.