ISBN-13: 9780064462457 / Angielski / Miękka / 2001 / 40 str.
It's 4 tickets for the Treetop Coaster Just 2 for the Elephant Twirl five cousins each have 20 tickets to spend at Safari, and a little algebra will tell them how many rides they can try. But who will dare the death-defying Terrible Tarantula?