I found this info on the disney web site. I guess it's recent. Not sure.
Castaway Cay Activity Type: Water Sports Activity Level: Moderate Duration: 30 minutes Price:
Adult: Aqua Fin $15,
Sea Kayak (1-Seater $8, 2-Seater $10),
Hobie Cat $18,
Aqua Trike $15,
Paddle Boats (2-Seater $8, 4-Seater $10),
Sun Kat $20
Child: N/A Ages: 5 And Up Additional Information Children under the age of 13 must be accompanied by an adult
I don't remember seeing peanut butter but I am thinking it must be at the buffet area Beach Blanket or Topsiders.
I think beach toys at
Walmart will be a good investment. I remember being unhappy about the price at CC, but I can't remember the exact price.
Have a great trip.