I have no idea who this little guy is. Just popped in my garden looking all puffy and cute.
Just a guess, but I would think probably something from the Amanita family? And that only narrows it down to about 600 species containing everything from deadly to delicious.
Looks like a variety of Amanita muscaria (fly agaric).
Usually, they are bright red, but sometimes, they can be yellow, pink, orange, and so on.
I wouldn't eat it, but adore that little guy! :)