Because we've always homeschooled, I own every Core.
My five-year-old was initially sad because he only got a couple new books to add to Core K UNTIL he noticed the inside of the box. Here he is with his finished product:

Sonlight Box Castle
BTW, the fuzzy balls are cannon balls and he painted the entire outside and inside by himself. He has played and played with his special Sonlight box for the past two months.
Ms. Lynn S.