Seven-year-old Tessa and ten-year-old Cammie, the first female president's daughters, investigate when a diamond goes missing from the collar of their very rambunctious dog.
Seven-year-old Tessa and ten-year-old Cammie, daughters of the first female president, and their dog Hooligan, investigate when an ostrich egg is substituted for a rare dinosaur egg on loan from another country.
Seven-year-old Tessa and ten-year-old Cammie, the first female president's daughters, investigate when gold is discovered on the White House grounds and Tessa's piggy bank goes missing.