Here is what comes next: Ian falls forward on his face on the chair (deliberately) and allows gravity to pull him into a slow fall OFF the chair head-first, knowing that Daddy will not only catch him but propel him into a mid-air flip and set him gently on his feet, during which time he will both drool incessantly and giggle maniacally. When the flip is done he will attempt to climb BACK onto the chair to . . . you guessed it, do it all again.
The only thing that could possibly interrupt this game is the arrival of Molly the cat, partly because this is her favorite chair and partly because every time Ian sees her he feels the need to shriek like a very happy banshee and literally tackle her with his whole body, pulling out great hanks of fur and grinning.
Molly, who is heavily into masochism, apparently, permits this.
And just think, some day soon he's going to be walking. God help us all.