Thor and Loki are like four and six in this. Thor's the eldest.
Thor came running into the room where Odin and frigga where in.
"Yes father?" Thor breathed trying to catch his breath. He'd just run across the bridge and with his chubby little legs then that was a challenge.
"Ah yes. Where is your brother!" Odin asked and Thor smiled.
"Oh. He's playing with himself again."
Thor said and shrugged.
"HES WHAT?" Frigga yells and they all run to the back room or find Loki playing a game of chess with his double.
"Yes Mother?" Loki said simply setting his chess piece down.
"Oh Nothing."