Lions at Lunchtime (Magic Tree House No. 11) P

Jack and Annie are whisked off to the vast plains of Africa, where they must 
solve Morgan le Fay's third magical riddle. But that's only the beginning! Once 
the riddle is solved, they still have to get past a pride of lions, a humongous 
herd of rampaging wildebeests, and one very hungry Masai warrior.