You can take the dash action as a bonus action. When taking the dash action(not as a bonus action), you can add your movement speed again. ex. 25+25+25 = 75

Because of your tiny size you gain proficiency in stealth and acrobatics checks

You also get advantage on saving throws to avoid the grappled or prone conditions

You have expertise in Intimidation checks

You have disadvantage on Death Saving Throws and on Intelligence(History, Investigation, Religion) checks

You have proficiency in Nature or Survival checks

You can grapple in an interesting Manner

When taking the grapple action you instead latch on to the creature. The creature must succeed on a Str./Dex. (it chooses which) saving throw (DC = 8 + Prof. Bonus + Dex.), or have the latched on condition (the latched on condition is made up because it's pretty much the exact opposite of the grappled condition).

While you are grappling a creature your movement speed is reduced to 0, and the creatures speed is halved if the creature is medium or smaller

The creature has disadvantage on attack rolls against you, and you have advantage on attack rolls against it.

You speak common(for the sake of party communication despite the fact that it's not realistic), and 1 rare language of your choice

You also gain the speak to animals spell, using the speak to animals spell does not consume a spell slot

You have advantage on Charisma(decepiton, persuasion) against humans, or people with pets