Seat or Slide?

One of Aiden's favorite places to chill is his little lamb seat. When we first put him in it, his head is nice and high, at the top of the seat. However, after a good nap, the little guy is practically sliding out of the chair (and looking incredibly confused about it....could also be affected by the waking up effect that he isn't a big fan of...). Soooo, does Aiden think he's hanging out in a seat or on a slide?