The "little green one" from Yo Gabba Gabba!, who is a little slow compared to his playmates (they see to always be singing the "Keep Trying" song to him) is Brobee.
Grandma and Grandpa Roberts got Rebekah a Brobee doll for Christmas, and he's quickly risen up the ranks of Rebekah's favorite things, meaning he's pretty irreplaceable now.
They play together.
Rebekah is determined to potty train him.
And at nap time, he's always right there with her.