The secret treasure in my house

The secret treasure in my house it is very fat and big i love to cuddle with it so much it is very cute i always play with at home my mom and me always talk to it when it is very lonely sometimes i cuddle with when i go to sleep.It always stay still and close its eye when i make it lay on its back but it will run around sometimes by itself i play with it in my living room all the time.It likes to stay beside me my dad always look at it is sleeping on my bed. Try To Guess What It Is?