And Lyon says...

We are getting ready to go to the park
Our stroller was sitting by the front door
Lyon strolls it into the living room
He wants to ride in it
I tell him he can't because Sissy is going to
because she is the baby and can't walk
He want to ride in it
I tell him he is a big boy and can walk
He says:

"No! Sissy big boy, me baby!"

then he climbs into the stroller